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		<id>http://wiki.christophchamp.com/index.php?action=history&amp;feed=atom&amp;title=Crystal_symmetry</id>
		<title>Crystal symmetry - Revision history</title>
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		<updated>2026-05-23T12:12:35Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>http://wiki.christophchamp.com/index.php?title=Crystal_symmetry&amp;diff=2919&amp;oldid=prev</id>
		<title>Christoph at 22:49, 11 October 2006</title>
		<link rel="alternate" type="text/html" href="http://wiki.christophchamp.com/index.php?title=Crystal_symmetry&amp;diff=2919&amp;oldid=prev"/>
				<updated>2006-10-11T22:49:45Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class='diff diff-contentalign-left'&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
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				&lt;tr style='vertical-align: top;' lang='en'&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 22:49, 11 October 2006&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l35&quot; &gt;Line 35:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 35:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;|| '''a''', '''b''', and '''c''' perpendicular and equal in length&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;|| '''a''', '''b''', and '''c''' perpendicular and equal in length&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;|}&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;|}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;== Bravais lattices ==&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt; see: [[wikipedia:Bravais lattice|Bravais lattice]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;== Space groups ==&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt; see: [[wikipedia:Space groups|Space groups]], [http://fr.wikipedia.org/wiki/Syst%C3%A8me_cristallin#Les_230_groupes_d.27espace Overview of all space groups] (in French)&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Crystallography]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Crystallography]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Christoph</name></author>	</entry>

	<entry>
		<id>http://wiki.christophchamp.com/index.php?title=Crystal_symmetry&amp;diff=2918&amp;oldid=prev</id>
		<title>Christoph at 22:43, 11 October 2006</title>
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				<updated>2006-10-11T22:43:22Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;{| align=&amp;quot;center&amp;quot; style=&amp;quot;border: 1px solid #999; background-color:#FFFFFF&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! colspan=&amp;quot;4&amp;quot; bgcolor=&amp;quot;#EFEFEF&amp;quot; | '''Crystal Systems'''&lt;br /&gt;
|-align=&amp;quot;center&amp;quot; style=&amp;quot;background-color:#1188ee; color:#ffffff;&amp;quot;&lt;br /&gt;
!System&lt;br /&gt;
!Minimum symmetry&lt;br /&gt;
!Dimensional requirements for unit cell&lt;br /&gt;
|--bgcolor=&amp;quot;#eeeeee&amp;quot;&lt;br /&gt;
| [[wikipedia:Triclinic|Triclinic]]&lt;br /&gt;
|| none&lt;br /&gt;
|| none&lt;br /&gt;
|-----&lt;br /&gt;
| [[wikipedia:Monoclinic|Monoclinic]]&lt;br /&gt;
|| Twofold axis (parallel to '''b''')&lt;br /&gt;
|| '''a''' and '''c''' are both perpendicular to '''b''' (but not to each other)&lt;br /&gt;
|--bgcolor=&amp;quot;#eeeeee&amp;quot;&lt;br /&gt;
| [[wikipedia:Orthorhombic|Orthorhombic]]&lt;br /&gt;
|| Three mutually perpendicular twofold axes&lt;br /&gt;
|| '''a''', '''b''', and '''c''' all perpendicular&lt;br /&gt;
|-----&lt;br /&gt;
| [[wikipedia:Tetragonal|Tetragonal]]&lt;br /&gt;
|| Fourfold axis (parallel to '''c''')&lt;br /&gt;
|| '''a''', '''b''', and '''c''' all perpendicular; '''a''' and '''b''' equal in length&lt;br /&gt;
|--bgcolor=&amp;quot;#eeeeee&amp;quot;&lt;br /&gt;
| [[wikipedia:Rhombohedral|Rhombohedral]] (or Trigonal)&lt;br /&gt;
|| Threefold axis (parallel to '''c''')&lt;br /&gt;
|| '''a''', '''b''' perpendicular to '''c''' and at 120° to each other; '''a''' and '''b''' equal&lt;br /&gt;
|-----&lt;br /&gt;
| [[wikipedia:Hexagonal_%28crystal_system%29|Hexagonal]]&lt;br /&gt;
|| Sixfold axis (parallel to '''c''')&lt;br /&gt;
|| Same as trigonal&lt;br /&gt;
|--bgcolor=&amp;quot;#eeeeee&amp;quot;&lt;br /&gt;
| [[wikipedia:Cubic_crystal_system|Cubic]]&lt;br /&gt;
|| Threefold axes along cube diagonals&lt;br /&gt;
|| '''a''', '''b''', and '''c''' perpendicular and equal in length&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[Category:Crystallography]]&lt;/div&gt;</summary>
		<author><name>Christoph</name></author>	</entry>

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