Symmetry dictionary (symCIF) version 1.0.1
_space_group.IT_coordinate_system_code
Name:'_space_group.IT_coordinate_system_code'
Definition:
A qualifier taken from the enumeration list identifying which setting in International Tables for Crystallography Volume A (2002) (IT) is used. See IT Table 4.3.2.1, Section 2.2.16, Table 2.2.16.1, Section 2.2.16.1 and Fig. 2.2.6.4. This item is not computer-interpretable and cannot be used to define the coordinate system. Use _space_group.transform_* instead. Ref: International Tables for Crystallography (2002). Volume A, Space-group symmetry, edited by Th. Hahn, 5th ed. Dordrecht: Kluwer Academic Publishers.
Type: char
Mandatory item: no
The data value must be one of the following:
b1 | monoclinic unique axis b, cell choice 1, abc |
b2 | monoclinic unique axis b, cell choice 2, abc |
b3 | monoclinic unique axis b, cell choice 3, abc |
-b1 | monoclinic unique axis b, cell choice 1, c-ba |
-b2 | monoclinic unique axis b, cell choice 2, c-ba |
-b3 | monoclinic unique axis b, cell choice 3, c-ba |
c1 | monoclinic unique axis c, cell choice 1, abc |
c2 | monoclinic unique axis c, cell choice 2, abc |
c3 | monoclinic unique axis c, cell choice 3, abc |
-c1 | monoclinic unique axis c, cell choice 1, ba-c |
-c2 | monoclinic unique axis c, cell choice 2, ba-c |
-c3 | monoclinic unique axis c, cell choice 3, ba-c |
a1 | monoclinic unique axis a, cell choice 1, abc |
a2 | monoclinic unique axis a, cell choice 2, abc |
a3 | monoclinic unique axis a, cell choice 3, abc |
-a1 | monoclinic unique axis a, cell choice 1, -acb |
-a2 | monoclinic unique axis a, cell choice 2, -acb |
-a3 | monoclinic unique axis a, cell choice 3, -acb |
abc | orthorhombic |
ba-c | orthorhombic |
cab | orthorhombic |
-cba | orthorhombic |
bca | orthorhombic |
a-cb | orthorhombic |
1abc | orthorhombic origin choice 1 |
1ba-c | orthorhombic origin choice 1 |
1cab | orthorhombic origin choice 1 |
1-cba | orthorhombic origin choice 1 |
1bca | orthorhombic origin choice 1 |
1a-cb | orthorhombic origin choice 1 |
2abc | orthorhombic origin choice 2 |
2ba-c | orthorhombic origin choice 2 |
2cab | orthorhombic origin choice 2 |
2-cba | orthorhombic origin choice 2 |
2bca | orthorhombic origin choice 2 |
2a-cb | orthorhombic origin choice 2 |
1 | tetragonal or cubic origin choice 1 |
2 | tetragonal or cubic origin choice 2 |
h | trigonal using hexagonal axes |
r | trigonal using rhombohedral axes |
Category: space_group