Symmetry elements and Wyckoff positions (interactive)
Sn₂F₃Cl in P213
SettingUnit cell
- Lattice constants
- a = 7.840 Å, b = 7.840 Å, c = 7.840 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 481.9 ų
- Atoms in the conventional cell
- 24 (Cl 4, Sn 8, F 12)
- Formula units Z
- 4
- Pearson symbol
- cP24 — cubic, primitive lattice, 24 atoms per conventional cell
- Symmetry operations
- 12 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Cl1 | Cl | 4a | 4 | 0.9890 | 0.9890 | 0.9890 |
| Sn2 | Sn | 4a | 4 | 0.3176 | 0.3176 | 0.3176 |
| Sn3 | Sn | 4a | 4 | 0.6490 | 0.6490 | 0.6490 |
| F4 | F | 12b | 12 | 0.3750 | 0.1350 | 0.1190 |
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 12 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
AB3C2_cP24_198_a_b_2a-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol cP24, then the space-group number 198, then the Wyckoff letters occupied by each element in turn (Cl: 4a; Sn: 4a; Sn: 4a; F: 12b). 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 AB3C2_cP24_198_a_b_2a-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.
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