Crystal Lab › Prototype structures › Cubic
CuCrCl₅[NH₃]₆ Cl₅CrCuH₁₈N₆
Cubic · space group Fd-3c (No. 228) · Pearson cF416
Symmetry elements and Wyckoff positions (interactive)
CuCrCl₅[NH₃]₆ in Fd-3c
SettingUnit cell
- Lattice constants
- a = 22.265 Å, b = 22.265 Å, c = 22.265 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 11037.4 ų
- Atoms in the conventional cell
- 416 (Cu 32, Cr 32, Cl 160, N 192)
- Formula units Z
- 32
- Pearson symbol
- cF416 — cubic, face-centred lattice, 416 atoms per conventional cell
- Symmetry operations
- 192 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Cu4 | Cu | 32b | 32 | 0.2500 | 0.2500 | 0.2500 |
| Cr3 | Cr | 32c | 32 | 0.0000 | 0.0000 | 0.0000 |
| Cl1 | Cl | 64e | 64 | 0.1900 | 0.1900 | 0.1900 |
| Cl2 | Cl | 96g | 96 | 0.2500 | 0.4250 | 0.5750 |
| N5 | N | 192h | 192 | 0.5500 | 0.6800 | 0.2800 |
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 416 atoms drawn above are these sites multiplied by all 192 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
A5BCD6_cF416_228_eg_c_b_h-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol cF416, then the space-group number 228, then the Wyckoff letters occupied by each element in turn (Cu: 32b; Cr: 32c; Cl: 64e; Cl: 96g; N: 192h). 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 A5BCD6_cF416_228_eg_c_b_h-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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