Demo
You entered the OD groupoid family symbol: pma(2) { n_(s,2) n_(2,1+r) (2_2)}
The OD groupoid family parsed fine.
General OD Family Symbol
p | m | a | | (2) | | |
{ | ns',2 | n2,-1+r' | ( | 22 | ) | } |
Reduced general OD Family Symbol
p | m | a | | (2) | | |
{ | ns',2 | n2,-1+r' | ( | 22 | ) | } |
General Data
OD family of layers
Kinds of layers: | N=1 |
Category: | II (single) |
Pointgroup: | mm2 (C2v) |
Crystal system: | orthorhombic |
Layer system: | rectangular |
Common lattice: | same |
Common lattice size (rel. to global): | 1 |
Layer planes: | (001) |
c0 | (0,0,1) |
Global lattice restriction: | ab=0 |
User supplied lattice restriction: | none |
Lattice restriction derived from layers: | ab=0 |
Layer Data
Layer 0:
Type: | Layer group |
Symbol: | pma(2) |
Crystal system: | orthorhombic |
Layer system: | rectangular |
Polarity: | polar |
Lattice restriction (instrinsic): | ab=0 |
Lattice restriction (extrinsic): | ab=0 |
Lattice (rel. to global): | same |
Lattice (rel. to common): | same |
Lattice size (rel. to global): | 1 |
Lattice size (rel. to common): | 1 |
Order (modulo lattice): | 4 |
Order (modulo global lattice): | 4 |
Order (modulo common lattice): | 4 |
Floating origin: | 0,0,z |
Symmetry operations:
x,y,z | 1 |
-x+1/2,y,z | m |
x+1/2,-y,z | a |
-x,-y,z | 2 |
Special positions:
x,y,z
1/4,y,z
0,0,z
Centring vectors:
none
Special parameters