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Result of symbol lookup:
Space group number: 134
Schoenflies symbol: D4h^12
Hermann-Mauguin symbol: P 42/n n m
Origin choice: 2
Hall symbol: -P 4ac 2bc
Input space group symbol: P 42/n n m :2
Convention: Default
Number of lattice translations: 1
Space group is centric.
Number of representative symmetry operations: 8
Total number of symmetry operations: 16
Parallelepiped containing an asymmetric unit:
0<=x<=1/4; 1/4<=y<=3/4; 0<=z<1
List of symmetry operations:
Matrix
| Rotation-part type
| Axis direction
| Screw/glide component
| Origin shift
|
x,y,z
| 1 | - | - | -
|
-y+1/2,x,z+1/2
| 4^1 | [0,0,1] | 0,0,1/2 | 1/4,1/4,0
|
-x+1/2,-y+1/2,z
| 2 | [0,0,1] | 0,0,0 | 1/4,1/4,0
|
y,-x+1/2,z+1/2
| 4^-1 | [0,0,1] | 0,0,1/2 | 1/4,1/4,0
|
x,-y+1/2,-z+1/2
| 2 | [1,0,0] | 0,0,0 | 0,1/4,1/4
|
y,x,-z
| 2 | [1,1,0] | 0,0,0 | 0,0,0
|
-x+1/2,y,-z+1/2
| 2 | [0,1,0] | 0,0,0 | 1/4,0,1/4
|
-y+1/2,-x+1/2,-z
| 2 | [-1,1,0] | 0,0,0 | 1/2,0,0
|
-x,-y,-z
| -1 | - | - | 0,0,0
|
y-1/2,-x,-z-1/2
| -4^1 | [0,0,1] | 0,0,0 | -1/4,1/4,-1/4
|
x-1/2,y-1/2,-z
| -2 | [0,0,1] | -1/2,-1/2,0 | 0,0,0
|
-y,x-1/2,-z-1/2
| -4^-1 | [0,0,1] | 0,0,0 | 1/4,-1/4,-1/4
|
-x,y-1/2,z-1/2
| -2 | [1,0,0] | 0,-1/2,-1/2 | 0,0,0
|
-y,-x,z
| -2 | [1,1,0] | 0,0,0 | 0,0,0
|
x-1/2,-y,z-1/2
| -2 | [0,1,0] | -1/2,0,-1/2 | 0,0,0
|
y-1/2,x-1/2,z
| -2 | [-1,1,0] | -1/2,-1/2,0 | 0,0,0
|
List of Wyckoff positions:
Wyckoff letter
| Multiplicity
| Site symmetry point group type
| Representative special position operator
|
n | 16 | 1 | x,y,z
|
m | 8 | m | x,-x,z
|
l | 8 | 2 | x,x,1/2
|
k | 8 | 2 | x,x,0
|
j | 8 | 2 | x,1/4,1/4
|
i | 8 | 2 | x,1/4,-1/4
|
h | 8 | 2 | 1/4,1/4,z
|
g | 4 | mm2 | -1/4,1/4,z
|
f | 4 | 2/m | 0,0,0
|
e | 4 | 2/m | 0,0,1/2
|
d | 4 | 222 | 1/4,1/4,0
|
c | 4 | 222 | 1/4,1/4,1/4
|
b | 2 | -42m | -1/4,1/4,1/4
|
a | 2 | -42m | 1/4,-1/4,1/4
|
Harker planes:
Algebraic
| Normal vector
| A point in the plane
|
x-y+1/2,-x-y,1/2 | [0,0,1] | 1/2,0,1/2
|
2*x+1/2,2*y+1/2,0 | [0,0,1] | 1/2,1/2,0
|
0,2*y+1/2,2*z+1/2 | [1,0,0] | 0,1/2,1/2
|
x+y,-x-y,2*z | [1,1,0] | 0,0,0
|
2*x+1/2,0,2*z+1/2 | [0,1,0] | 1/2,0,1/2
|
x+y+1/2,x+y+1/2,2*z | [-1,1,0] | 1/2,1/2,0
|
Additional generators of Euclidean normalizer:
Number of structure-seminvariant vectors and moduli: 2
Vector Modulus
(0, 0, 1) 2
(1, 1, 0) 2
Grid factors implied by symmetries:
Space group: (2, 2, 2)
Structure-seminvariant vectors and moduli: (2, 2, 2)
Euclidean normalizer: (2, 2, 2)
All points of a grid over the unit cell are mapped
exactly onto other grid points only if the factors
shown above are factors of the grid.
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