Changeset 3553 for Tutorials/MCsimanneal
- Timestamp:
- Aug 3, 2018 10:51:26 PM (5 years ago)
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Tutorials/MCsimanneal/MCSA in GSAS.htm
r3078 r3553 1401 1401 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1402 1402 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font: 1403 minor-latin'>2-amino</span></b>). You will need to varyat least <b1403 minor-latin'>2-amino</span></b>). You will need to refine at least <b 1404 1404 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1405 1405 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>X</span></b> … … 1432 1432 both and see what comes out (Hint: its <b style='mso-bidi-font-weight:normal'><span 1433 1433 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1434 mso-hansi-theme-font:minor-latin'>Orthorhombic-P</span></b>). The correct unit 1434 mso-hansi-theme-font:minor-latin'>Orthorhombic-P</span></b>). 1435 Click on <B>Cell Index/Refine/Index Cell</B>. The correct unit 1435 1436 cell should almost immediately appear with an M20 ~370 with a=7.748, b=7.650, 1436 1437 c=12.736, Vol=755.01. NB: your solution may have a & b switched. Do <b … … 1443 1444 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1444 1445 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>P 2<sub>1</sub> 1445 2<sub>1</sub> 2<sub>1</sub></span></b>). You can then do <b style='mso-bidi-font-weight: 1446 2<sub>1</sub> 2<sub>1</sub></span></b>). 1447 Under the <B>General</B> tab, change the space group to <B>P 21 21 21</B>. 1448 You can then do <b style='mso-bidi-font-weight: 1446 1449 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1447 1450 minor-latin;mso-hansi-theme-font:minor-latin'>Cell Index/Refine/Refine Cell</span></b> … … 1508 1511 to find the <b style='mso-bidi-font-weight:normal'><span style='font-family: 1509 1512 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 1510 minor-latin'>Pawley controls</span></b>. Check the <b style='mso-bidi-font-weight: 1511 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1512 minor-latin;mso-hansi-theme-font:minor-latin'>Do Pawley refinement</span></b> 1513 minor-latin'>Pawley controls</span></b> under the <B>General</B> tab. 1514 Check the <b style='mso-bidi-font-weight: 1515 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1516 minor-latin;mso-hansi-theme-font:minor-latin'>Do Pawley refinement?</span></b> 1513 1517 box, enter the d-spacing (<b style='mso-bidi-font-weight:normal'><span 1514 1518 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; … … 1784 1788 C1-C3 defines the Z-axis (blue; default view direction) and the Y-axis is 1785 1789 defined as Z-axis cross X-axis (green; down toward C5). You can change these 1786 via the pull downs (you cant pick the same atom for two of these so pick them 1790 via the pull downs 1791 next to <B>Orientation reference non-H atoms A-B-C</B> 1792 (you cant pick the same atom for two of these so pick them 1787 1793 appropriately; I chose C2, C3 & C6). At each choice the structure will be 1788 1794 transformed accordingly. My new model is</p> … … 1813 1819 includes H-atoms; they are not really needed for MC/SA and will just make 1814 1820 computation times a bit longer than necessary. They can be removed by selecting 1815 the Strip H-atoms box; for now leave them in. </p>1821 the <B>Strip H-atoms box</B>; for now leave them in. </p> 1816 1822 1817 1823 <p class=MsoNormal><o:p> </o:p></p> … … 2032 2038 minor-latin'> current settings</span></b>; your choice becomes available immediately 2033 2039 and is then set for all your future uses of GSAS-II. <span 2034 style='mso-spacerun:yes'> </span>Do <b style='mso-bidi-font-weight:normal'><span 2040 style='mso-spacerun:yes'> </span>Go to the <B>General</B> tab and 2041 select 2042 <b style='mso-bidi-font-weight:normal'><span 2035 2043 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 2036 2044 mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>Compute/Multi … … 2056 2064 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 2057 2065 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>MC/SA Refine</span></b> 2058 box . Using 10% of the ranges reduces the search volume in this case by ~62066 box under the <B>General</B> tab. Using 10% of the ranges reduces the search volume in this case by ~6 2059 2067 orders of magnitude so that the true minimum is much easier to find. Now rerun <b 2060 2068 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; … … 2166 2174 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 2167 2175 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>. <span 2168 class=GramE>size</span></span></b> &<span class=SpellE><b2176 class=GramE>size</span></span></b> and both <span class=SpellE><b 2169 2177 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 2170 2178 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>mustrain</span></b></span>
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