https://dictionary.iucr.org/index.php?title=Modular_crystal_structure&feed=atom&action=history
Modular crystal structure - Revision history
2024-03-29T13:51:59Z
Revision history for this page on the wiki
MediaWiki 1.30.0
https://dictionary.iucr.org/index.php?title=Modular_crystal_structure&diff=4748&oldid=prev
MassimoNespolo: partial operations
2018-11-30T14:56:14Z
<p>partial operations</p>
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<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 14:56, 30 November 2018</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l4" >Line 4:</td>
<td colspan="2" class="diff-lineno">Line 4:</td></tr>
<tr><td class='diff-marker'> </td><td style="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;"><div>A '''modular crystal structure''' is a structure built by periodically juxtaposing one or more types of modules, which are three-dimensional but less than triperiodic objects that can ideally be described as cuts from a (real or hypothetical) structurally and chemically homogeneous parent structure: the '''archetype'''.  </div></td><td class='diff-marker'> </td><td style="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;"><div>A '''modular crystal structure''' is a structure built by periodically juxtaposing one or more types of modules, which are three-dimensional but less than triperiodic objects that can ideally be described as cuts from a (real or hypothetical) structurally and chemically homogeneous parent structure: the '''archetype'''.  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"></td><td class='diff-marker'> </td><td style="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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The symmetry of the modular structure is described by an ordinary space group, whereas the building modules possess only a [[subperiodic group]].</div></td><td class='diff-marker'>+</td><td style="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;"><div>The symmetry of the modular structure is described by an ordinary space group, whereas the building modules possess only a [[subperiodic group<ins class="diffchange diffchange-inline">]]; the operations mapping different modules are [[partial symmetry|partial operations</ins>]].</div></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"></td><td class='diff-marker'> </td><td style="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;"></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"><div>The modules can be obtained from chemically different archetypes: the resulting structures are known as '''polyarchetypal structures''' ('''diarchetypal''' being the most frequent case) and are evidently also heterochemical (different composition) with respect to each of the archetypes. When instead the modules are obtained from the same archetype, they are known as '''monoarchetypal structures'''.</div></td><td class='diff-marker'> </td><td style="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;"><div>The modules can be obtained from chemically different archetypes: the resulting structures are known as '''polyarchetypal structures''' ('''diarchetypal''' being the most frequent case) and are evidently also heterochemical (different composition) with respect to each of the archetypes. When instead the modules are obtained from the same archetype, they are known as '''monoarchetypal structures'''.</div></td></tr>
</table>
MassimoNespolo
https://dictionary.iucr.org/index.php?title=Modular_crystal_structure&diff=4536&oldid=prev
BrianMcMahon: Tidied translations.
2017-11-16T12:57:16Z
<p>Tidied translations.</p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 12:57, 16 November 2017</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>
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<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><<del class="diffchange diffchange-inline">Font </del>color="blue">Structure cristalline modulaire</font> (''Fr''). <<del class="diffchange diffchange-inline">Font </del>color="black">Struttura cristallina modulare</<del class="diffchange diffchange-inline">Font</del>> (''It''). <<del class="diffchange diffchange-inline">Font </del>color="purple"> モジュール結晶構造 </<del class="diffchange diffchange-inline">Font</del>>(''Ja'').</div></td><td class='diff-marker'>+</td><td style="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;"><div><<ins class="diffchange diffchange-inline">font </ins>color="blue">Structure cristalline modulaire</font> (''Fr''). <<ins class="diffchange diffchange-inline">font </ins>color="black">Struttura cristallina modulare</<ins class="diffchange diffchange-inline">font</ins>> (''It''). <<ins class="diffchange diffchange-inline">font </ins>color="purple">モジュール結晶構造</<ins class="diffchange diffchange-inline">font</ins>> (''Ja'').</div></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"></td><td class='diff-marker'> </td><td style="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;"></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"></td><td class='diff-marker'> </td><td style="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;"></td></tr>
</table>
BrianMcMahon
https://dictionary.iucr.org/index.php?title=Modular_crystal_structure&diff=4207&oldid=prev
BrianMcMahon: Style edits to align with printed edition
2017-05-20T09:19:45Z
<p>Style edits to align with printed edition</p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 09:19, 20 May 2017</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l3" >Line 3:</td>
<td colspan="2" class="diff-lineno">Line 3:</td></tr>
<tr><td class='diff-marker'> </td><td style="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;"></td><td class='diff-marker'> </td><td style="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;"></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"><div>A '''modular crystal structure''' is a structure built by periodically juxtaposing one or more types of modules, which are three-dimensional but less than triperiodic objects that can ideally be described as cuts from a (real or hypothetical) structurally and chemically homogeneous parent structure: the '''archetype'''.  </div></td><td class='diff-marker'> </td><td style="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;"><div>A '''modular crystal structure''' is a structure built by periodically juxtaposing one or more types of modules, which are three-dimensional but less than triperiodic objects that can ideally be described as cuts from a (real or hypothetical) structurally and chemically homogeneous parent structure: the '''archetype'''.  </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"><div>The symmetry of the modular structure is described by an ordinary space group, whereas the building modules possess only a [[subperiodic group]].</div></td><td class='diff-marker'> </td><td style="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;"><div>The symmetry of the modular structure is described by an ordinary space group, whereas the building modules possess only a [[subperiodic group]].</div></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"></td><td class='diff-marker'> </td><td style="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;"></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"><div>The modules can be obtained from chemically different archetypes: the resulting structures are known as '''polyarchetypal structures''' ('''diarchetypal''' being the most frequent case) and are evidently also heterochemical (different composition) with respect to each of the archetypes. When instead the modules are obtained from the same archetype, they are known as '''monoarchetypal structures'''.</div></td><td class='diff-marker'> </td><td style="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;"><div>The modules can be obtained from chemically different archetypes: the resulting structures are known as '''polyarchetypal structures''' ('''diarchetypal''' being the most frequent case) and are evidently also heterochemical (different composition) with respect to each of the archetypes. When instead the modules are obtained from the same archetype, they are known as '''monoarchetypal structures'''.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"></td><td class='diff-marker'> </td><td style="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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The generation of a series of structures from the periodic juxtaposition of modules is obtained by varying the relative orientation and/or position of adjacent modules. This juxtaposition in monoarchetypal structures may or may not promote a chemical change at the interface <del class="diffchange diffchange-inline">between two </del>modules: the resulting structures are thus '''heterochemical''' or '''isochemical''' respectively.</div></td><td class='diff-marker'>+</td><td style="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;"><div>The generation of a series of structures from the periodic juxtaposition of modules is obtained by varying the relative orientation and/or position of adjacent modules. This juxtaposition in monoarchetypal structures may or may not promote a chemical change at the interface <ins class="diffchange diffchange-inline">between two </ins>modules: the resulting structures are thus '''heterochemical''' or '''isochemical''' respectively.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"></td><td class='diff-marker'> </td><td style="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;"></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"><div>==See also==</div></td><td class='diff-marker'> </td><td style="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;"><div>==See also==</div></td></tr>
</table>
BrianMcMahon
https://dictionary.iucr.org/index.php?title=Modular_crystal_structure&diff=4044&oldid=prev
BrianMcMahon: Style edits to align with printed edition
2017-05-15T16:58:20Z
<p>Style edits to align with printed edition</p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 16:58, 15 May 2017</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>
<td colspan="2" class="diff-lineno">Line 1:</td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><Font color="blue">Structure cristalline modulaire</font> (''Fr'')<del class="diffchange diffchange-inline">, </del><Font color="black"> Struttura cristallina modulare</Font> (''It'')<del class="diffchange diffchange-inline">, </del><Font color="purple"> モジュール結晶構造 </Font>(''Ja'')</div></td><td class='diff-marker'>+</td><td style="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;"><div><Font color="blue">Structure cristalline modulaire</font> (''Fr'')<ins class="diffchange diffchange-inline">. </ins><Font color="black">Struttura cristallina modulare</Font> (''It'')<ins class="diffchange diffchange-inline">. </ins><Font color="purple"> モジュール結晶構造 </Font>(''Ja'')<ins class="diffchange diffchange-inline">.</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"></td><td class='diff-marker'> </td><td style="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;"></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"></td><td class='diff-marker'> </td><td style="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;"></td></tr>
</table>
BrianMcMahon
https://dictionary.iucr.org/index.php?title=Modular_crystal_structure&diff=3602&oldid=prev
MassimoNespolo: interna link
2015-06-07T12:34:27Z
<p>interna link</p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 12:34, 7 June 2015</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l10" >Line 10:</td>
<td colspan="2" class="diff-lineno">Line 10:</td></tr>
<tr><td class='diff-marker'> </td><td style="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;"></td><td class='diff-marker'> </td><td style="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;"></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"><div>==See also==</div></td><td class='diff-marker'> </td><td style="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;"><div>==See also==</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Modulated crystal structure]]</div></td><td class='diff-marker'>+</td><td style="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;"><div><ins class="diffchange diffchange-inline">*[[Cell-twinning]]</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="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;"><div><ins class="diffchange diffchange-inline">*</ins>[[Modulated crystal structure]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"></td><td class='diff-marker'> </td><td style="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;"></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"><div>[[Category:Crystal chemistry]]</div></td><td class='diff-marker'> </td><td style="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;"><div>[[Category:Crystal chemistry]]</div></td></tr>
</table>
MassimoNespolo
https://dictionary.iucr.org/index.php?title=Modular_crystal_structure&diff=3598&oldid=prev
MassimoNespolo: change of category
2015-06-07T11:22:54Z
<p>change of category</p>
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<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 11:22, 7 June 2015</td>
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MassimoNespolo
https://dictionary.iucr.org/index.php?title=Modular_crystal_structure&diff=3524&oldid=prev
MassimoNespolo: Created page with "<Font color="blue">Structure cristalline modulaire</font> (''Fr''), <Font color="black"> Struttura cristallina modulare</Font> (''It''), <Font color="purple"> モジュール結..."
2015-03-17T13:26:31Z
<p>Created page with "<Font color="blue">Structure cristalline modulaire</font> (''Fr''), <Font color="black"> Struttura cristallina modulare</Font> (''It''), <Font color="purple"> モジュール結..."</p>
<p><b>New page</b></p><div><Font color="blue">Structure cristalline modulaire</font> (''Fr''), <Font color="black"> Struttura cristallina modulare</Font> (''It''), <Font color="purple"> モジュール結晶構造 </Font>(''Ja'')<br />
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A '''modular crystal structure''' is a structure built by periodically juxtaposing one or more types of modules, which are three-dimensional but less than triperiodic objects that can ideally be described as cuts from a (real or hypothetical) structurally and chemically homogeneous parent structure: the '''archetype'''. <br />
The symmetry of the modular structure is described by an ordinary space group, whereas the building modules possess only a [[subperiodic group]].<br />
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The modules can be obtained from chemically different archetypes: the resulting structures are known as '''polyarchetypal structures''' ('''diarchetypal''' being the most frequent case) and are evidently also heterochemical (different composition) with respect to each of the archetypes. When instead the modules are obtained from the same archetype, they are known as '''monoarchetypal structures'''.<br />
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The generation of a series of structures from the periodic juxtaposition of modules is obtained by varying the relative orientation and/or position of adjacent modules. This juxtaposition in monoarchetypal structures may or may not promote a chemical change at the interface between two modules: the resulting structures are thus '''heterochemical''' or '''isochemical''' respectively.<br />
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==See also==<br />
[[Modulated crystal structure]]<br />
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[[Category:Fundamental crystallography]]</div>
MassimoNespolo