Crystal Lab › Prototype structures › Monoclinic
CrPS₄
Monoclinic · space group C121 (No. 5) · Pearson mC24
Symmetry elements and Wyckoff positions (interactive)
CrPS₄ in C121
SettingUnit cell
- Lattice constants
- a = 10.871 Å, b = 7.254 Å, c = 12.659 Å; α = 90.00°, β = 151.00°, γ = 90.00°
- Cell volume
- 483.9 ų
- Atoms in the conventional cell
- 24 (Cr 4, P 4, S 16)
- Formula units Z
- 4
- Pearson symbol
- mC24 — monoclinic, base-centred lattice, 24 atoms per conventional cell
- Symmetry operations
- 4 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Cr1 | Cr | 2a | 2 | 0.0000 | 0.0000 | 0.0000 |
| Cr2 | Cr | 2a | 2 | 0.0000 | 0.5095 | 0.0000 |
| P3 | P | 4c | 4 | 0.4626 | 0.2588 | 0.1655 |
| S4 | S | 4c | 4 | 0.8342 | 0.9916 | 0.7007 |
| S5 | S | 4c | 4 | 0.3340 | 0.0248 | 0.6993 |
| S6 | S | 4c | 4 | 0.7996 | 0.7594 | 0.1934 |
| S7 | S | 4c | 4 | 0.7755 | 0.2575 | 0.1452 |
The multiplicity and the Wyckoff letter say how many copies of the site the group makes in one cell and on which kind of symmetry element the site sits; the 24 atoms drawn above are these sites multiplied by all 4 operations. Press Wyckoff under Colour to see the sites, and tick a symmetry element on the left to see which atoms lie on it.
How to read the label
ABC4_mC24_5_2a_c_4c-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol mC24, then the space-group number 5, then the Wyckoff letters occupied by each element in turn (Cr: 2a; Cr: 2a; P: 4c; S: 4c; S: 4c; S: 4c; S: 4c). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry ABC4_mC24_5_2a_c_4c-001 (M. J. Mehl et al., Comput. Mater. Sci. 136, S1 (2017); D. Hicks et al., ibid. 161, S1 (2019) and 199, 110450 (2021); S. Eckert et al., ibid. 240, 112988 (2024)). Symmetry elements, Wyckoff assignment and the diagram are computed on this page from the group operations.
← (Ba,Ca)CO₃ ( C2 ) · Space group C121 (11 prototypes) · All prototypes · High Temperature Monoclinic TlS — STl →