Table 1.3.4.2

Koch, E.

doi:10.1107/97809553602060000574

International
Tables for
Crystallography
Volume C
Mathematical, physical and chemical tables
Edited by E. Prince

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International Tables for Crystallography (2006). Vol. C. ch. 1.3, p. 13

Table 1.3.4.2

E. Koch^a

^a Institut für Mineralogie, Petrologie und Kristallographie, Universität Marburg, Hans-Meerwein-Strasse, D-35032 Marburg, Germany

Table 1.3.4.2 | top | pdf |
Simulated Laue classes , extinction symbols , simulated `possible space groups', and possible true space groups for crystals twinned by merohedry (type 2)

Twinned crystal			Single crystal
Simulated Laue class	Twin extinction symbol	Simulated `possible space groups'	Possible true space groups
4/mmm	P - - -	$[P\bar42m]$ , $[P\bar4m2,]$	$[P4, P\bar4, P4/m]$
	- -
	- -
	- -
	- -	–
	I - - -	$[I422, I4mm, I\bar42m,]$ $[I\bar4m2,]$	$[I4, I\bar4, I4/m]$
	- -
	- -	–
$[\bar3m1]$	P - - -	, $[P\bar3m1]$	$[P3, P\bar3]$
$[\bar3m1]$	- -
$[\bar31m]$	P - - -	, $[P\bar31m]$	$[P3, P\bar3]$
$[\bar31m]$	- -
$[\bar3m]$	R - -	$[R32, R3m, R\bar3m]$	$[R3, R\bar3]$
	P - - -	$[P6, P\bar6, P6/m]$	$[P3, P\bar3]$
	- -
	P - - -	$[P\bar6m2]$ , $[P\bar62m,]$	$[P3, P\bar3, P321]$ , , $[P31m, P\bar3m1,]$ $[P\bar31m, P6, P\bar6,]$
	- -
	- -		, ,
	- -
	P - - c	$[P6_3mc, P\bar62c,]$	$[P31c, P{\bar 3}1c]$
	P - c -	$[P6_3cm, P\bar6c2,]$	$[P3c1, P\bar3c1]$
$[m\bar3m]$	P - - -	$[P432,P\bar43m,]$ $[Pm\bar3m]$	$[P23, Pm\bar3]$
	- -	$[P4_{2}32]$
	- -	$[Pn\bar 3 m]$	$[Pn\bar 3]$
	I - - -	$[I432, I\bar43m,Im\bar3m]$	$[I23, I2_13, Im\bar3]$
	Ia - -	–	$[Ia\bar3]$
	F - - -	$[F432, F\bar43m,]$ $[Fm\bar3m]$	$[F23, Fm\bar3]$
	Fd - -	$[Fd\bar3m]$	$[Fd\bar3]$
	- -	–	$[Pa\bar3]$