Data Item _space_group.centring_type

General

Item name
_space_group.centring_type
Category name
space_group
Attribute name
centring_type
Required in PDB entries
no
Used in currrent PDB entries
No

Item Description

Symbol for the lattice centring. This symbol may be dependent on the coordinate system chosen.

Data Type

Data type code
char
Data type detail
char item types / multi-word items ...
Primitive data type code
char
Regular expression
[][ \t_(),.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*

Controlled Vocabulary

Allowed Value Details
A a face centred (0,1/2,1/2)
B b face centred (1/2,0,1/2)
C c face centred (1/2,1/2,0)
F all faces centred (0,1/2,1/2),(1/2,0,1/2),(1/2,1/2,0)
H hexagonal centred (2/3,1/3,0),(1/3,2/3,0)
I body centred (1/2,1/2,1/2)
P primitive no centring
R rhombohedral obverse centred (2/3,1/3,1/3),(1/3,2/3,2/3)
Rrev rhombohedral reverse centred (1/3,2/3,1/3),(2/3,1/3,2/3)

Controlled Vocabulary at Deposition

Allowed Value Details
A a face centred (0,1/2,1/2)
B b face centred (1/2,0,1/2)
C c face centred (1/2,1/2,0)
F all faces centred (0,1/2,1/2),(1/2,0,1/2),(1/2,1/2,0)
H hexagonal centred (2/3,1/3,0),(1/3,2/3,0)
I body centred (1/2,1/2,1/2)
P primitive no centring
R rhombohedral obverse centred (2/3,1/3,1/3),(1/3,2/3,2/3)
Rrev rhombohedral reverse centred (1/3,2/3,1/3),(2/3,1/3,2/3)