Changeset 4624 for Tutorials/Magnetic-V/Magnetic-V.htm

Timestamp:

Oct 26, 2020 9:40:05 PM (3 years ago)

Author:

toby

Message:

improve rigid body stuff; finish tutorial

File:

• Tutorials/Magnetic-V/Magnetic-V.htm (modified) (9 diffs)

Tutorials/Magnetic-V/Magnetic-V.htm

@@ -2181 +2181 @@
 Do <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
-minor-latin'>"Cell Index/Refine"/"Load Phase"</span></b> from the menu; a Phase
-selection box will appear with only one choice (<b style='mso-bidi-font-weight:
-normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
-minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>Mn3O4</span></b>).
-This was taken from the Phases present in this project; there could be more
-than one depending on what you loaded/created earlier. The <b style='mso-bidi-font-weight:
-normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
-minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>Import</span></b>
-menu item allows you to get lattice information from any one of the other phase
-containing files known to GSAS-II.<br>
-Press <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
-mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
-minor-latin'>OK</span></b> and the Indexing controls will be change<br>
+minor-latin'>"Cell Index/Refine"/"Load Phase"</span></b> from the
+menu; since there is only one phase available, it is selected, but if
+more that one were present a Phase
+selection box would appear to offer a choice.
+Note that the <b style='mso-bidi-font-weight:
+normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
+minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>
+"Import Cell"</span></b>
+menu item allows you to get lattice information from a phase in a file
+(which can be in any of the formats that 
+GSAS-II can read). 
+The Indexing controls will change, as shown:<br>
 <span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_13"
  o:spid="_x0000_i1057" type="#_x0000_t75" style='width:339.75pt;height:115.5pt;
@@ -2200 +2199 @@
 </v:shape><![endif]--><![if !vml]><img border=0 width=453 height=154
 src="Magnetic-V_files/image095.gif" v:shapes="Picture_x0020_13"><![endif]></span><br>
-showing the lattice constants for Mn<sub>3</sub>O<sub>4</sub> you had obtained
+This shows the symmetry settings and
+lattice constants for Mn<sub>3</sub>O<sub>4</sub> you had obtained
 from the <span class=SpellE>gpx</span> file and the powder pattern will change
 showing the lines for I 41/<span class=SpellE>amd</span> and the Mn<sub>3</sub>O<sub>4</sub>
@@ -2207 +2207 @@
 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>I
 4/m <span class=SpellE>m</span> <span class=SpellE>m</span></span></b>; the
-plot will change showing the new lines.<br>
+plot will change showing the new lines allowed with body centering,
+but no other extinction conditions.<br>
 <span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_14"
  o:spid="_x0000_i1056" type="#_x0000_t75" style='width:341.25pt;height:303pt;
@@ -2225 +2226 @@
 as needed to each, or else just do <b style='mso-bidi-font-weight:normal'><span
 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
-mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>Load unit
-cell</span></b> again). Recall that the chemical unit cell is I-centered; maybe
+mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>Load Phase</span></b> again). Recall that the chemical unit cell is I-centered; maybe
 the centering is lost in forming the magnetic space group. Set the <span
 class=SpellE><b style='mso-bidi-font-weight:normal'><span style='font-family:
@@ -2237 +2237 @@
 mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>P4/mmm</span></b>
 and the space group to match. Then try doubling the a-axis; that indexes every
-line. So we need two parts to the propagation vector; one to double a (or b)
+line. So, we need two parts to the propagation vector; one to double a (or b)
 and one to remove the centering. This makes sense considering the report that
 there are two low temperature phase transitions for this material. They would
-be (1/2<span class=GramE>,0,0</span>) or (0,1/2,0) and (0,0,0). I’m going to
+be (1/2<span class=GramE>,0,0</span>) or (0,1/2,0) and (0,0,0). Of the
+first two, I’m going to
 pick (0<span class=GramE>,1</span>/2,0) for the 1<sup>st</sup> one as that will
 match what was originally used.</p>
@@ -2251 +2252 @@
 for the Mn3O4 phase,
 which can be done easily reusing the "Cell Index/Refine"/"Load Phase"
-menu item again. Then, in the Cell
-Index/Refine menu select <b style='mso-bidi-font-weight:normal'><span
-style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
-mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>Run
-k-SUBGROUPSMAG</span></b>; a small popup dialog will appear</p>
+menu item again. Then, in the "Cell
+Index/Refine" menu select <b style='mso-bidi-font-weight:normal'><span
+style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
+mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>"Run
+k-SUBGROUPSMAG"</span></b>; a small popup dialog will appear</p>
 
 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
@@ -2264 +2265 @@
 src="Magnetic-V_files/image097.gif" v:shapes="Picture_x0020_55"><![endif]></span></p>
 
-<p class=MsoNormal>To set the propagation vectors, set <b style='mso-bidi-font-weight:
-normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
-minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>ky1=1/2</span></b>
+<p class=MsoNormal>To set the propagation vectors
+to (0,1/2,0) and (0,0,0), set <b style='mso-bidi-font-weight:
+normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
+minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>
+y for k-vector 1</span></b>
+to
+<b style='mso-bidi-font-weight:
+normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
+minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>
+1/2</span></b>
 and <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
-minor-latin'>kx2 , ky2 &amp; kz2</span></b> to <b style='mso-bidi-font-weight:
+minor-latin'>x, y &amp; z for k-vector 2 </span></b> to <b style='mso-bidi-font-weight:
 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>0,
@@ -2305 +2313 @@
 10K.<o:p></o:p></span></b></p>
 
-<p class=MsoNormal>The GSAS-II data window will display the 184(!) results from
+<p class=MsoNormal>The GSAS-II data window will display the 205(!) results from
 k-SUBGROUPSMAG. (If k-SUBGROUPSMAG failed because you lack internet access,
 this file is located in the same location as the powder data and <span
@@ -2317 +2325 @@
 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
 mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>Save as</span></b>
-to save it immediately in your working directory.). The Unit Cells List window
+to save it immediately in your working directory.).
+</P><p class=MsoNormal>
+The Unit Cells List window
 will show the results<br>
 <span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_17"