Selective merohedry - Revision history

BrianMcMahon: Tidied translations.

2017-11-20T08:41:27Z

Tidied translations.

BrianMcMahon: Style edits to align with printed edition

2017-05-17T10:29:10Z

Style edits to align with printed edition

MassimoNespolo at 09:29, 15 June 2008

2008-06-15T09:29:10Z

MassimoNespolo at 09:21, 15 June 2008

2008-06-15T09:21:40Z

New page

Mériédrie sélective (''Fr''). Meroedria selettiva (''It''). 精選欠面像 (''Ja'')

In [[twinning by merohedry]], the [[twin operation]]s belong to the point group of the crystal lattice. When twinning concerns an [[OD structure]], the definition of merohedry should take into account not only the point group of the crystal and tha of the lattice, but also the point group of the [[family structure]]. If the latter is a subgroup of the [[twin point group]], some of the twin laws restore only a part of the reciprocal lattice nodes corresponding to the family reflections (the reflections common to all the OD structures of a family). This kind of twinning is called '''twinning by selective merohedry''': it can occur when the [[Laue classes|Laue point group]] of the crystal is lower than the twin point group, ''i''.''e''. in the so-called “class II twins”.

[[Category:Twinning]]

@@ Line 1: / Line 1: @@
-<Font color="blue"> Mériédrie sélective </Font>(''Fr''). <Font color="black"> Meroedria selettiva </Font>(''It''). <Font color="purple">  精選欠面像 </Font>(''Ja'').
+<font color="blue">Mériédrie sélective</font> (''Fr''). <font color="black">Meroedria selettiva</font> (''It''). <font color="purple">精選欠面像</font> (''Ja'').
 In [[twinning by merohedry]], the [[twin operation]]s belong to the point group of the crystal lattice. When twinning concerns an [[OD structure]], the definition of merohedry should take into account not only the point group of the crystal and that of the lattice, but also the point group of the [[family structure]]. If the latter is a subgroup of the [[twin operation|twin point group]], some of the twin laws restore only a part of the reciprocal lattice nodes corresponding to the family reflections (the reflections common to all the OD structures of a family). This kind of twinning is called '''twinning by selective merohedry''': it can occur when the [[Laue classes|Laue point group]] of the crystal is lower than the twin point group, ''i.e.'' in the so-called 'class II twins'.
 [[Category:Twinning]]

@@ Line 1: / Line 1: @@
-<Font color="blue"> Mériédrie sélective </Font>(''Fr''). <Font color="black"> Meroedria selettiva </Font>(''It''). <Font color="purple">  精選欠面像 </Font>(''Ja'')
+<Font color="blue"> Mériédrie sélective </Font>(''Fr''). <Font color="black"> Meroedria selettiva </Font>(''It''). <Font color="purple">  精選欠面像 </Font>(''Ja'').
+In [[twinning by merohedry]], the [[twin operation]]s belong to the point group of the crystal lattice. When twinning concerns an [[OD structure]], the definition of merohedry should take into account not only the point group of the crystal and that of the lattice, but also the point group of the [[family structure]]. If the latter is a subgroup of the [[twin operation|twin point group]], some of the twin laws restore only a part of the reciprocal lattice nodes corresponding to the family reflections (the reflections common to all the OD structures of a family). This kind of twinning is called '''twinning by selective merohedry''': it can occur when the [[Laue classes|Laue point group]] of the crystal is lower than the twin point group, ''i.e.'' in the so-called 'class II twins'.
 [[Category:Twinning]]

← Older revision		Revision as of 09:29, 15 June 2008
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−	In [[twinning by merohedry]], the [[twin operation]]s belong to the point group of the crystal lattice. When twinning concerns an [[OD structure]], the definition of merohedry should take into account not only the point group of the crystal and tha of the lattice, but also the point group of the [[family structure]]. If the latter is a subgroup of the [[twin point group]], some of the twin laws restore only a part of the reciprocal lattice nodes corresponding to the family reflections (the reflections common to all the OD structures of a family). This kind of twinning is called '''twinning by selective merohedry''': it can occur when the [[Laue classes\|Laue point group]] of the crystal is lower than the twin point group, ''i''.''e''. in the so-called “class II twins”.	+	In [[twinning by merohedry]], the [[twin operation]]s belong to the point group of the crystal lattice. When twinning concerns an [[OD structure]], the definition of merohedry should take into account not only the point group of the crystal and tha of the lattice, but also the point group of the [[family structure]]. If the latter is a subgroup of the [[twin operation\|twin point group]], some of the twin laws restore only a part of the reciprocal lattice nodes corresponding to the family reflections (the reflections common to all the OD structures of a family). This kind of twinning is called '''twinning by selective merohedry''': it can occur when the [[Laue classes\|Laue point group]] of the crystal is lower than the twin point group, ''i''.''e''. in the so-called “class II twins”.

	[[Category:Twinning]]		[[Category:Twinning]]