Changeset 3553 for Tutorials/StackingFaults-I/Stacking Faults-I.htm
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- Aug 3, 2018 10:51:26 PM (5 years ago)
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Tutorials/StackingFaults-I/Stacking Faults-I.htm
r3081 r3553 1131 1131 Simulations I<o:p></o:p></span></h1> 1132 1132 1133 <P><B>A video version of this tutorial is available at 1134 <A href="https://anl.box.com/v/StackingFaults-I" target="_blank"> 1135 https://anl.box.com/v/StackingFaults-I</A></B></P> 1136 1133 1137 <p class=MsoNormal>In this exercise you will use GSAS-II to simulate the 1134 1138 diffraction patterns from faulted diamond. Diamond most commonly has the … … 1384 1388 <p class=MsoNormal>You can explore the result of various stacking sequences in 1385 1389 the next block of commands; enter <b><span style='font-family:"Calibri",sans-serif'>1 1386 1 1 1 2 2 2</span></b> into the box and press <b><span style='font-family:"Calibri",sans-serif'>Enter</span></b>.1390 1 1 1 2 2 2</span></b> into the box (remember to include spaces in between each number) and press <b><span style='font-family:"Calibri",sans-serif'>Enter</span></b>. 1387 1391 A plot showing the result of a single twin fault will be shown.</p> 1388 1392 … … 1508 1512 for the <b><span style='font-family:"Calibri",sans-serif'>Histogram scale 1509 1513 factor</span></b> and change the <b><span style='font-family:"Calibri",sans-serif'>Diffractometer 1510 type</span></b> to <b><span style='font-family:"Calibri",sans-serif'>Bragg-Brentano</span></b>. 1514 type</span></b> to <b><span 1515 style='font-family:"Calibri",sans-serif'>Bragg-Brentano</span></b> (if 1516 not already set to that). 1511 1517 Finally, find your phase (<b><span style='font-family:"Calibri",sans-serif'>random 1512 1518 faults</span></b>) and select it and then the <b><span style='font-family:"Calibri",sans-serif'>Layers</span></b> … … 1525 1531 the powder pattern will be displayed with the result. On the plot press the <b><span 1526 1532 style='font-family:"Calibri",sans-serif'>+</span></b> key to suppress the + 1527 marks. The plot should look like: Ive expanded the scale to show the 1528 interesting stuff around each peak.</p> 1533 marks. The plot should look like: </p> 1529 1534 1530 1535 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape … … 1534 1539 </v:shape><![endif]--><![if !vml]><img width=624 height=535 1535 1540 src="Stacking%20Faults-I_files/image042.gif" v:shapes="Picture_x0020_51"><![endif]></span></p> 1536 1541 (Ive expanded the scale to show the 1542 interesting stuff around each peak.) 1543 <p></p> 1537 1544 <p class=MsoNormal>The blue line is a simulated observed pattern with imposed 1538 1545 Poisson noise, the red line is the calculated background and the green curve is … … 1572 1579 as layer 2 to layer 2 at each step in the simulation. We can force this by 1573 1580 selecting <b><span style='font-family:"Calibri",sans-serif'>Symmetric 1574 probabilities?</span></b> <span class=GramE>on</span> the Layers page. Do this1581 probabilities?</span></b> <span class=GramE>on</span> the Layers tab. Do this 1575 1582 and repeat the sequential simulation as above. Now the matrices are symmetric 1576 1583 as one could expect. When the simulation is finished, select the <b><span … … 1837 1844 "Calibri",sans-serif'>Edit range</span></b> from the data window. Dont change 1838 1845 anything, just press <b><span style='font-family:"Calibri",sans-serif'>Ok</span></b>; 1839 this will clear the previous simulation. Then return to the clustered phase 1846 this will clear the previous simulation. Then return to the random 1847 faults phase 1840 1848 Layers tab. Do <b><span style='font-family:"Calibri",sans-serif'>Operations/Simulate 1841 1849 pattern</span></b> and press <b><span style='font-family:"Calibri",sans-serif'>Ok</span></b>
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