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Result of symbol lookup:
Space group number: 152
Schoenflies symbol: D3^4
Hermann-Mauguin symbol: P 31 2 1
Hall symbol: P 31 2"
Input space group symbol: P 31 2 1
Convention: Default
Number of lattice translations: 1
Space group is acentric.
Space group is chiral.
Space group is enantiomorphic.
Number of representative symmetry operations: 6
Total number of symmetry operations: 6
Parallelepiped containing an asymmetric unit:
0<=x<=1/2; 0<=y<1; 0<=z<=1/3
List of symmetry operations:
Matrix
| Rotation-part type
| Axis direction
| Screw/glide component
| Origin shift
|
x,y,z
| 1 | - | - | -
|
-y,x-y,z+1/3
| 3^1 | [0,0,1] | 0,0,1/3 | 0,0,0
|
-x+y,-x,z+2/3
| 3^-1 | [0,0,1] | 0,0,2/3 | 0,0,0
|
y,x,-z
| 2 | [1,1,0] | 0,0,0 | 0,0,0
|
-x,-x+y,-z+1/3
| 2 | [0,1,0] | 0,0,0 | 0,0,1/6
|
x-y,-y,-z+2/3
| 2 | [1,0,0] | 0,0,0 | 0,0,1/3
|
List of Wyckoff positions:
Wyckoff letter
| Multiplicity
| Site symmetry point group type
| Representative special position operator
|
c | 6 | 1 | x,y,z
|
b | 3 | 2 | x,0,-1/6
|
a | 3 | 2 | x,0,1/3
|
Harker planes:
Algebraic
| Normal vector
| A point in the plane
|
x-y,-x-2*y,1/3 | [0,0,1] | 0,0,1/3
|
x+y,-x-y,2*z | [1,1,0] | 0,0,0
|
2*x,x,2*z+1/3 | [0,1,0] | 0,0,1/3
|
y,2*y,2*z+2/3 | [1,0,0] | 0,0,2/3
|
Additional generators of Euclidean normalizer:
Number of structure-seminvariant vectors and moduli: 1
Vector Modulus
(0, 0, 1) 2
Further generators:
Matrix
| Rotation-part type
| Axis direction
| Screw/glide component
| Origin shift
|
-x,-y,z
| 2 | [0,0,1] | 0,0,0 | 0,0,0
|
Grid factors implied by symmetries:
Space group: (1, 1, 3)
Structure-seminvariant vectors and moduli: (1, 1, 2)
Euclidean normalizer: (1, 1, 6)
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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