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Tutorials/FitPeaks/Fit Peaks.htm
r1725 r2389 23 23 <o:Author>Von Dreele</o:Author> 24 24 <o:LastAuthor>Von Dreele</o:LastAuthor> 25 <o:Revision> 6</o:Revision>26 <o:TotalTime> 948</o:TotalTime>25 <o:Revision>7</o:Revision> 26 <o:TotalTime>1035</o:TotalTime> 27 27 <o:Created>2014-07-21T14:48:00Z</o:Created> 28 <o:LastSaved>201 5-03-17T15:22:00Z</o:LastSaved>29 <o:Pages> 1</o:Pages>30 <o:Words>302 4</o:Words>31 <o:Characters>172 42</o:Characters>28 <o:LastSaved>2016-07-28T18:11:00Z</o:LastSaved> 29 <o:Pages>27</o:Pages> 30 <o:Words>3023</o:Words> 31 <o:Characters>17232</o:Characters> 32 32 <o:Company>Argonne National Laboratory</o:Company> 33 33 <o:Lines>143</o:Lines> 34 34 <o:Paragraphs>40</o:Paragraphs> 35 <o:CharactersWithSpaces>202 26</o:CharactersWithSpaces>36 <o:Version>1 5.00</o:Version>35 <o:CharactersWithSpaces>20215</o:CharactersWithSpaces> 36 <o:Version>16.00</o:Version> 37 37 </o:DocumentProperties> 38 38 <o:OfficeDocumentSettings> … … 44 44 <!--[if gte mso 9]><xml> 45 45 <w:WordDocument> 46 <w:View>Print</w:View> 46 47 <w:SpellingState>Clean</w:SpellingState> 47 48 <w:GrammarState>Clean</w:GrammarState> … … 663 664 {font-family:"Cambria Math"; 664 665 panose-1:2 4 5 3 5 4 6 3 2 4; 665 mso-font-charset: 0;666 mso-font-charset:1; 666 667 mso-generic-font-family:roman; 667 668 mso-font-pitch:variable; 668 mso-font-signature: -536870145 1107305727 0 0 4150;}669 mso-font-signature:0 0 0 0 0 0;} 669 670 @font-face 670 671 {font-family:Calibri; … … 1169 1170 mso-hansi-font-family:"Courier New"; 1170 1171 mso-bidi-font-family:"Courier New";} 1172 p.msonormal0, li.msonormal0, div.msonormal0 1173 {mso-style-name:msonormal; 1174 mso-style-noshow:yes; 1175 mso-style-priority:99; 1176 mso-style-unhide:no; 1177 mso-margin-top-alt:auto; 1178 margin-right:0in; 1179 mso-margin-bottom-alt:auto; 1180 margin-left:0in; 1181 mso-pagination:widow-orphan; 1182 font-size:12.0pt; 1183 font-family:"Times New Roman",serif; 1184 mso-fareast-font-family:"Times New Roman"; 1185 mso-fareast-theme-font:minor-fareast;} 1171 1186 span.TitleChar 1172 1187 {mso-style-name:"Title Char"; … … 1460 1475 the <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1461 1476 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 1462 Calibri;mso-bidi-theme-font:minor-latin'>Import/Powder Data/from GSAS powder data1463 file</span></b> menu item to read the data file into the current GSAS-II1477 Calibri;mso-bidi-theme-font:minor-latin'>Import/Powder Data/from GSAS powder 1478 data file</span></b> menu item to read the data file into the current GSAS-II 1464 1479 project. This read option is set to read any of the powder data formats defined 1465 1480 for GSAS (angles in <span class=SpellE>centidegrees</span>, TOF in µsec). Other … … 1491 1506 minor-latin'>Help/Download tutorial</span></b><span style='mso-fareast-font-family: 1492 1507 Calibri;mso-fareast-theme-font:minor-latin'> menu entry to open this page and 1493 downloaded the exercise files (recommended), then the </span><b 1508 downloaded the exercise files (recommended), then the </span><span 1509 class=SpellE><b style='mso-bidi-font-weight:normal'><span style='font-family: 1510 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-fareast-font-family: 1511 Calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>FitPeaks</span></b></span><b 1494 1512 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1495 1513 mso-ascii-theme-font:minor-latin;mso-fareast-font-family:Calibri;mso-fareast-theme-font: 1496 minor-latin;mso-hansi-theme-font:minor-latin'> Import/...</span></b><span1514 minor-latin;mso-hansi-theme-font:minor-latin'>/data/...</span></b><span 1497 1515 style='mso-fareast-font-family:Calibri;mso-fareast-theme-font:minor-latin'> 1498 1516 entry will bring you to the location where the files have been downloaded. (It … … 1517 1535 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 1518 1536 Calibri;mso-bidi-theme-font:minor-latin'>Open</span></b>. There will be a 1519 Dialog box asking <span class=GramE><b style='mso-bidi-font-weight:normal'><span 1520 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1521 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 1522 minor-latin'>Is</span></b></span><b style='mso-bidi-font-weight:normal'><span 1523 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1524 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 1525 minor-latin'> this the file you want?</span></b> Press <span class=GramE><b 1526 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1527 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 1528 Calibri;mso-bidi-theme-font:minor-latin'>Yes</span></b></span> button to 1529 proceed.</p> 1537 Dialog box asking <b style='mso-bidi-font-weight:normal'><span 1538 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1539 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 1540 minor-latin'>Is this the file you want?</span></b> Press <b style='mso-bidi-font-weight: 1541 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1542 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri; 1543 mso-bidi-theme-font:minor-latin'>Yes</span></b> button to proceed.</p> 1530 1544 1531 1545 <p class=MsoListParagraphCxSpLast style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span … … 1575 1589 src="Fit%20Peaks_files/image001.png" v:shapes="Picture_x0020_1"><![endif]></span></p> 1576 1590 1577 <p class=MsoNormal><span class=GramE>and</span> the plot window will show the 1578 powder pattern</p> 1591 <p class=MsoNormal>and the plot window will show the powder pattern</p> 1579 1592 1580 1593 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape 1581 id=" _x0000_i1049" type="#_x0000_t75" style='width:525pt;height:450pt;1582 visibility:visible;mso-wrap-style:square'>1594 id="Picture_x0020_2" o:spid="_x0000_i1049" type="#_x0000_t75" style='width:525pt; 1595 height:450pt;visibility:visible;mso-wrap-style:square'> 1583 1596 <v:imagedata src="Fit%20Peaks_files/image002.png" o:title=""/> 1584 1597 </v:shape><![endif]--><![if !vml]><img border=0 width=700 height=600 1585 src="Fit%20Peaks_files/image002.png" v:shapes=" _x0000_i1049"><![endif]></span></p>1598 src="Fit%20Peaks_files/image002.png" v:shapes="Picture_x0020_2"><![endif]></span></p> 1586 1599 1587 1600 <h2>Step 2: Select Limits </h2> … … 1674 1687 1675 1688 <p class=MsoListParagraphCxSpMiddle style='margin-left:39.0pt;mso-add-space: 1676 auto'><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape id=" _x0000_i1047"1677 type="#_x0000_t75" style='width:525pt;height:450pt;visibility:visible;1678 mso-wrap-style:square'>1689 auto'><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_4" 1690 o:spid="_x0000_i1047" type="#_x0000_t75" style='width:525pt;height:450pt; 1691 visibility:visible;mso-wrap-style:square'> 1679 1692 <v:imagedata src="Fit%20Peaks_files/image004.png" o:title=""/> 1680 1693 </v:shape><![endif]--><![if !vml]><img border=0 width=700 height=600 1681 src="Fit%20Peaks_files/image004.png" v:shapes=" _x0000_i1047"><![endif]></span></p>1694 src="Fit%20Peaks_files/image004.png" v:shapes="Picture_x0020_4"><![endif]></span></p> 1682 1695 1683 1696 <p class=MsoListParagraphCxSpMiddle style='margin-left:39.0pt;mso-add-space: 1684 auto'> <span class=GramE>and</span> peaks are shown in the <b style='mso-bidi-font-weight:1685 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1686 m inor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;1687 m so-bidi-theme-font:minor-latin'>Peak List</span></b> window in order of1688 increasing 2<spanstyle='font-family:Symbol'>Q</span>.</p>1697 auto'>and peaks are shown in the <b style='mso-bidi-font-weight:normal'><span 1698 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1699 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 1700 minor-latin'>Peak List</span></b> window in order of increasing 2<span 1701 style='font-family:Symbol'>Q</span>.</p> 1689 1702 1690 1703 <p class=MsoListParagraphCxSpMiddle style='margin-left:39.0pt;mso-add-space: … … 1698 1711 <p class=MsoListParagraphCxSpLast style='margin-left:39.0pt;mso-add-space:auto'>There 1699 1712 will be 20 peaks in this example. You should examine both the list and the plot 1700 to be sure the auto search did not pick a peak twice ( quite rarely) or skip a1701 peak or shoulder. You can add a peak to the list by pressing the left mouse 1702 button with the pointer on a data point at the peak top or shoulder; be sure 1703 the zoom/shift buttons are off. You may drag a peak position as needed. A 1704 position may be deleted with a right click with the mouse on the blue line. You 1705 can also delete a peak by selecting the row in the table; it will be 1706 highlighted in blue. Then press the <b style='mso-bidi-font-weight:normal'><span 1707 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1708 mso-hansi-theme-font:minor-latin'>Delete</span></b> key; it will be removed 1709 from the table and the plot. The list will always show the peaks sorted by 1710 position . When done you should have 20 unique peak positions.</p>1713 to be sure the auto search did not pick a peak twice (rarely) or skip a peak or 1714 shoulder. You can add a peak to the list by pressing the left mouse button with 1715 the pointer on a data point at the peak top or shoulder; be sure the zoom/shift 1716 buttons are off. You may drag a peak position as needed. A position may be 1717 deleted with a right click with the mouse on the blue line. You can also delete 1718 a peak by selecting the row in the table; it will be highlighted in blue. Then 1719 press the <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1720 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Delete</span></b> 1721 key; it will be removed from the table and the plot. The list will always show 1722 the peaks sorted by position. When done you should have 20 unique peak 1723 positions.</p> 1711 1724 1712 1725 <h2>Step 4: Refine Peak Positions</h2> … … 1768 1781 auto;text-indent:-.25in;mso-list:l2 level2 lfo6'><![if !supportLists]><span 1769 1782 style='mso-fareast-font-family:"Times New Roman"'><span style='mso-list:Ignore'>a.<span 1770 style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]> <span1771 class=GramE>single-click</span> on any value in the table to select it, for 1772 example the first peak position. Ablack box appears around the value. </p>1783 style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>single-click 1784 on any value in the table to select it, for example the first peak position. A 1785 black box appears around the value. </p> 1773 1786 1774 1787 <p class=MsoListParagraphCxSpLast style='margin-left:1.0in;mso-add-space:auto; 1775 1788 text-indent:-.25in;mso-list:l2 level2 lfo6'><![if !supportLists]><span 1776 1789 style='mso-fareast-font-family:"Times New Roman"'><span style='mso-list:Ignore'>b.<span 1777 style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span 1778 class=GramE>single-click</span> on the <b style='mso-bidi-font-weight:normal'><span 1779 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1780 mso-hansi-theme-font:minor-latin'>refine</span></b> label above the peak 1781 position check-boxes. The entire column of checkboxes is highlighted in blue. 1782 Press the <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1783 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 1784 Calibri;mso-bidi-theme-font:minor-latin'>y</span></b> key to turn on all 1785 refinement flags (<b style='mso-bidi-font-weight:normal'><span 1786 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1787 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 1788 minor-latin'>n</span></b> would turn them off).</p> 1790 style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>single-click 1791 on the <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1792 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>refine</span></b> 1793 label above the peak position check-boxes. The entire column of checkboxes is 1794 highlighted in blue. Press the <b style='mso-bidi-font-weight:normal'><span 1795 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1796 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 1797 minor-latin'>y</span></b> key to turn on all refinement flags (<b 1798 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1799 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 1800 Calibri;mso-bidi-theme-font:minor-latin'>n</span></b> would turn them off).</p> 1789 1801 1790 1802 <p class=MsoNormal style='margin-left:.5in'>Next, repeat the refinement using … … 1887 1899 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1888 1900 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 1889 Calibri;mso-bidi-theme-font:minor-latin'>Operations/Load/Reload</span></b> to copy1890 the fitted peaks from the <b style='mso-bidi-font-weight:normal'><span1901 Calibri;mso-bidi-theme-font:minor-latin'>Operations/Load/Reload</span></b> to 1902 copy the fitted peaks from the <b style='mso-bidi-font-weight:normal'><span 1891 1903 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1892 1904 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: … … 1961 1973 style='mso-spacerun:yes'> </span></p> 1962 1974 1963 <p class=MsoNormal> <span class=GramE>while</span> the (M20~600) cell with1964 a=2.93932 Å generates notenough lines to match all the peaks</p>1975 <p class=MsoNormal>while the (M20~600) cell with a=2.93932 Å generates not 1976 enough lines to match all the peaks</p> 1965 1977 1966 1978 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape … … 1982 1994 two-theta zero: click on the <b style='mso-bidi-font-weight:normal'><span 1983 1995 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1984 mso-hansi-theme-font:minor-latin'>Refine?</span></b> <span class=GramE>checkbox</span> 1985 next to the <b style='mso-bidi-font-weight:normal'><span style='font-family: 1986 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 1987 minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:minor-latin'>Zero 1988 offset</span></b> value and then the <b style='mso-bidi-font-weight:normal'><span 1989 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1990 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 1991 minor-latin'>Cell Index/Refine/Refine Cell</span></b> menu option. The M20 1992 improves to ~3600 and <span class=GramE>the a</span> cell parameter value 1993 shifts from 4.15683 to 4.15691 when zero is refined. (NB: The certificate value 1994 for NIST SRM 660a is 4.15692 Å). Press the <b style='mso-bidi-font-weight:normal'><span 1995 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1996 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 1997 minor-latin'>Show <span class=SpellE>hkl</span> positions </span></b>button to 1998 update the plot including the refined <b style='mso-bidi-font-weight:normal'><span 1999 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2000 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 2001 minor-latin'>Zero offset</span></b> (in this case hardly anything 2002 happens!).<span style='mso-spacerun:yes'> </span></p> 1996 mso-hansi-theme-font:minor-latin'>Refine?</span></b> checkbox next to the <b 1997 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1998 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 1999 Calibri;mso-bidi-theme-font:minor-latin'>Zero offset</span></b> value and then 2000 the <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 2001 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 2002 Calibri;mso-bidi-theme-font:minor-latin'>Cell Index/Refine/Refine Cell</span></b> 2003 menu option. The M20 improves to ~3600 and <span class=GramE>the a</span> cell 2004 parameter value shifts from 4.15683 to 4.15691 when zero is refined. (NB: The 2005 certificate value for NIST SRM 660a is 4.15692 Å). Press the <b 2006 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 2007 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 2008 Calibri;mso-bidi-theme-font:minor-latin'>Show <span class=SpellE>hkl</span> 2009 positions </span></b>button to update the plot including the refined <b 2010 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 2011 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 2012 Calibri;mso-bidi-theme-font:minor-latin'>Zero offset</span></b> (in this case 2013 hardly anything happens!).<span style='mso-spacerun:yes'> </span></p> 2003 2014 2004 2015 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape … … 2016 2027 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 2017 2028 Calibri;mso-bidi-theme-font:minor-latin'>Unit Cells List</span></b> window with 2018 an improved <span class=GramE>M20(</span>~3600) and a new value for <b2019 style=' mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;2020 mso- ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:2021 Calibri;mso-bidi-theme-font:minor-latin'>Zero offset</span></b> is shown. NB:2022 the <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 2023 m so-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Show <span2024 class=SpellE>hkl</span> positions</span></b> button has an additional use; you 2025 c an enter the <span class=SpellE><b style='mso-bidi-font-weight:normal'><span2026 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2027 m so-hansi-theme-font:minor-latin'>Bravais</span></b></span><b style='mso-bidi-font-weight:2028 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 2029 m inor-latin;mso-hansi-theme-font:minor-latin'> lattice</span></b>, <b2030 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 2031 m so-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Space group</span></b>2032 & <bstyle='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;2029 an improved M20(~3600) and a new value for <b style='mso-bidi-font-weight:normal'><span 2030 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2031 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 2032 minor-latin'>Zero offset</span></b> is shown. NB: the <b style='mso-bidi-font-weight: 2033 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 2034 minor-latin;mso-hansi-theme-font:minor-latin'>Show <span class=SpellE>hkl</span> 2035 positions</span></b> button has an additional use; you can enter the <span 2036 class=SpellE><b style='mso-bidi-font-weight:normal'><span style='font-family: 2037 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 2038 minor-latin'>Bravais</span></b></span><b style='mso-bidi-font-weight:normal'><span 2039 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2040 mso-hansi-theme-font:minor-latin'> lattice</span></b>, <b style='mso-bidi-font-weight: 2041 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 2042 minor-latin;mso-hansi-theme-font:minor-latin'>Space group</span></b> & <b 2043 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 2033 2044 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Unit cell</span></b> 2034 2045 for any material. Then pressing <b style='mso-bidi-font-weight:normal'><span … … 2063 2074 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 2064 2075 minor-latin'>GSAS-II data tree </span></b>window. You will be asked if you want 2065 the current project saved; if < span class=GramE><b style='mso-bidi-font-weight:2066 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 2067 m inor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;2068 m so-bidi-theme-font:minor-latin'>Yes</span></b></span> then all the peak2069 fitting/indexing & cell refinement results will be saved to the <b 2070 style=' mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;2071 mso- ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:2072 Calibri;mso-bidi-theme-font:minor-latin'>LaB6.gpx</span></b> file. If <b 2073 style=' mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;2074 mso- ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:2075 Calibri;mso-bidi-theme-font:minor-latin'>No</span></b> then the file will 2076 remain as it was when created atStep 4 above.</p>2076 the current project saved; if <b style='mso-bidi-font-weight:normal'><span 2077 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2078 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 2079 minor-latin'>Yes</span></b> then all the peak fitting/indexing & cell 2080 refinement results will be saved to the <b style='mso-bidi-font-weight:normal'><span 2081 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2082 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 2083 minor-latin'>LaB6.gpx</span></b> file. If <b style='mso-bidi-font-weight:normal'><span 2084 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2085 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 2086 minor-latin'>No</span></b> then the file will remain as it was when created at 2087 Step 4 above.</p> 2077 2088 2078 2089 <h1><a name="kryptonite_peak_fit">2<sup>nd</sup> Fit Peaks/</a><span … … 2081 2092 2082 2093 <p class=MsoNormal>In this exercise we will fit peaks and index them for the 2083 new mineral <a href="http://en.wikipedia.org/wiki/Jadarite"> <span class=SpellE>jadarite</span></a>2084 (aka <a href="http://en.wikipedia.org/wiki/Kryptonite">kryptonite</a>). The2085 data were also collected on 11BM-B at APS. The unit cell is monoclinic so it is 2086 a more substantial test of the indexing capability of GSAS-II. The required 2087 data files should have been downloaded when you downloaded this tutorial. 2088 Otherwise you will need to get them manually from <span style='mso-fareast-font-family: 2089 Calibri;mso-fareast-theme-font:minor-latin'><a2094 new mineral <a href="http://en.wikipedia.org/wiki/Jadarite">jadarite</a> (aka <a 2095 href="http://en.wikipedia.org/wiki/Kryptonite">kryptonite</a>). The data were 2096 also collected on 11BM-B at APS. The unit cell is monoclinic so it is a more 2097 substantial test of the indexing capability of GSAS-II. The required data files 2098 should have been downloaded when you downloaded this tutorial. Otherwise you 2099 will need to get them manually from <span style='mso-fareast-font-family:Calibri; 2100 mso-fareast-theme-font:minor-latin'><a 2090 2101 href="https://subversion.xray.aps.anl.gov/pyGSAS/Exercises/FitPeaks/">https://subversion.xray.aps.anl.gov/pyGSAS/Exercises/FitPeaks/</a>. 2091 2102 Be sure to get both </span><b style='mso-bidi-font-weight:normal'><span … … 2100 2111 <h2>Step 1. Read in the data. </h2> 2101 2112 2102 <p class=MsoNormal>The file is <b style='mso-bidi-font-weight:normal'><span 2103 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2104 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 2105 minor-latin'>\exercises\<span class=SpellE>FitPeaks</span>\11bmb_6231.fxye</span></b>; 2106 it has a corresponding <span class=SpellE><b style='mso-bidi-font-weight:normal'><span 2113 <p class=MsoNormal>The file is <span class=SpellE><b style='mso-bidi-font-weight: 2114 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 2115 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri; 2116 mso-bidi-theme-font:minor-latin'>FitPeaks</span></b></span><b style='mso-bidi-font-weight: 2117 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 2118 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri; 2119 mso-bidi-theme-font:minor-latin'>\data\11bmb_6231.fxye</span></b>; it has a 2120 corresponding <span class=SpellE><b style='mso-bidi-font-weight:normal'><span 2107 2121 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2108 2122 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: … … 2242 2256 indexing. Be sure to use <b style='mso-bidi-font-weight:normal'><span 2243 2257 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2244 mso-hansi-theme-font:minor-latin'>Keep</span></b> to keep good ones as you try 2245 new indexing runs. The best solution is the one with the smaller volume and 2246 & #946; > 90 deg. The plot shows every peak indexed including a weak peak not2258 mso-hansi-theme-font:minor-latin'>Keep</span></b> to keep good ones as you try new 2259 indexing runs. The best solution is the one with the smaller volume and β 2260 > 90 deg. The plot shows every peak indexed including a weak peak not 2247 2261 selected for the peak fitting, although the weak peak at 2<span 2248 2262 style='font-family:Symbol;mso-char-type:symbol;mso-symbol-font-family:Symbol'><span … … 2290 2304 src="Fit%20Peaks_files/image021.png" v:shapes="Picture_x0020_43"><![endif]></span></p> 2291 2305 2292 <p class=MsoNormal>This concludes this exercise; < span class=GramE><b2293 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 2294 m so-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:2295 Calibri;mso-bidi-theme-font:minor-latin'>Save</span></b></span> the project 2296 file as it is needed for the <b style='mso-bidi-font-weight:normal'><span 2297 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2298 m so-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:2299 minor-latin'>ChargeFlipping</span></b> <b style='mso-bidi-font-weight:normal'><span2306 <p class=MsoNormal>This concludes this exercise; <b style='mso-bidi-font-weight: 2307 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 2308 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri; 2309 mso-bidi-theme-font:minor-latin'>Save</span></b> the project file as it is 2310 needed for the <b style='mso-bidi-font-weight:normal'><span style='font-family: 2311 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 2312 minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:minor-latin'>Charge 2313 Flipping</span></b> <b style='mso-bidi-font-weight:normal'><span 2300 2314 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2301 2315 mso-hansi-theme-font:minor-latin'>in GSAS</span></b> exercise. The features of … … 2324 2338 mso-fareast-font-family:Calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font: 2325 2339 minor-latin'>11bmb_8714.fxye<span class=GramE>, <span style='font-family:"Times New Roman",serif; 2326 font-weight:normal'><span style='mso-spacerun:yes'> </span></span>11 bmb</span>_8716.fxye</span></b><span2340 font-weight:normal'><span style='mso-spacerun:yes'> </span></span>11</span>bmb_8716.fxye</span></b><span 2327 2341 style='mso-fareast-font-family:Calibri;mso-fareast-theme-font:minor-latin'> and 2328 2342 the corresponding .<span class=SpellE>prm</span> files.</span></p> … … 2330 2344 <h2>Step 1. Read in the data. </h2> 2331 2345 2332 <p class=MsoNormal>The file is <b style='mso-bidi-font-weight:normal'><span 2333 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2334 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 2335 minor-latin'>\exercises\<span class=SpellE>FitPeaks</span>\11bmb_8716.fxye</span></b>; 2336 it has a corresponding <span class=SpellE><b style='mso-bidi-font-weight:normal'><span 2346 <p class=MsoNormal>The file is <span class=SpellE><b style='mso-bidi-font-weight: 2347 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 2348 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri; 2349 mso-bidi-theme-font:minor-latin'>FitPeaks</span></b></span><b style='mso-bidi-font-weight: 2350 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 2351 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri; 2352 mso-bidi-theme-font:minor-latin'>\data\11bmb_8716.fxye</span></b>; it has a 2353 corresponding <span class=SpellE><b style='mso-bidi-font-weight:normal'><span 2337 2354 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2338 2355 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: … … 2356 2373 2357 2374 <p class=MsoNormal>Ive zoomed in & shifted the plot some to highlight the 2358 lower part of the pattern; Ive also chosen to plot the square root of the intensity2359 (use <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 2360 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>S</span></b> 2361 key) as this shows weak peaks better.</p>2375 lower part of the pattern; Ive also chosen to plot the square root of the 2376 intensity (use <b style='mso-bidi-font-weight:normal'><span style='font-family: 2377 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 2378 minor-latin'>S</span></b> key) as this shows weak peaks better.</p> 2362 2379 2363 2380 <h2>Step 2 Set limits</h2> … … 2380 2397 can be moved by dragging the peak line and peaks can be deleted by 2381 2398 right-clicking on them. This only works when the zoom and reposition modes 2382 (below) are not selected. An easy to shift the view is to use the < and >2383 buttons. Also note the shoulder at ~6.3 <span class=SpellE>deg</span> that 2384 should be added to the list. I skipped a couple of very weak peaks; the total 2385 list has >28 peaks.</p>2399 (below) are not selected. An easy to shift the view is to use the < and 2400 > buttons. Also note the shoulder at ~6.3 <span class=SpellE>deg</span> 2401 that should be added to the list. I skipped a couple of very weak peaks; the 2402 total list has >28 peaks.</p> 2386 2403 2387 2404 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape … … 2483 2500 new indexing runs. The best solution is the one with the smaller volume and 2484 2501 β > 90 deg. The plot shows every peak indexed including the weak peaks 2485 not selected for the peak fitting. Copy the best cell and try to refine it 2486 along with the <b style='mso-bidi-font-weight:normal'><span style='font-family: 2487 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 2488 minor-latin'>Zero offset</span></b>. I obtained an improved M20 ~1300 and 2489 slightly different lattice parameters. Try different space groups, pressing the 2490 <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 2491 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Show <span 2492 class=SpellE>hkl</span> positions</span></b> each time to see which lines 2493 vanish. The correct space group is P2<sub>1</sub>. Armed with this information you 2494 can <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 2495 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 2496 Calibri;mso-bidi-theme-font:minor-latin'>Make new phase</span></b> for the 2497 indexed cell (I called it <b style='mso-bidi-font-weight:normal'><span 2498 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2499 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 2500 minor-latin'>sucrose</span></b>) and select <b style='mso-bidi-font-weight: 2501 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 2502 minor-latin;mso-hansi-theme-font:minor-latin'>Phases/sucrose</span></b> from 2503 the GSAS-II data tree.</p> 2502 not selected for the peak fitting. Copy the best cell and try to refine it along 2503 with the <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 2504 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Zero offset</span></b>. 2505 I obtained an improved M20 ~1300 and slightly different lattice parameters. Try 2506 different space groups, pressing the <b style='mso-bidi-font-weight:normal'><span 2507 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2508 mso-hansi-theme-font:minor-latin'>Show <span class=SpellE>hkl</span> positions</span></b> 2509 each time to see which lines vanish. The correct space group is P2<sub>1</sub>. 2510 Armed with this information you can <b style='mso-bidi-font-weight:normal'><span 2511 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2512 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 2513 minor-latin'>Make new phase</span></b> for the indexed cell (I called it <b 2514 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 2515 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 2516 Calibri;mso-bidi-theme-font:minor-latin'>sucrose</span></b>) and select <b 2517 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 2518 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Phases/sucrose</span></b> 2519 from the GSAS-II data tree.</p> 2504 2520 2505 2521 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
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