Crystal Lab › Prototype structures › Orthorhombic
K₂CuCl₃
Orthorhombic · space group Pnma (No. 62) · Pearson oP24
Symmetry elements and Wyckoff positions (interactive)
K₂CuCl₃ in Pnma
SettingUnit cell
- Lattice constants
- a = 12.000 Å, b = 4.200 Å, c = 12.560 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 633.0 ų
- Atoms in the conventional cell
- 24 (Cl 12, Cu 4, K 8)
- Formula units Z
- 4
- Pearson symbol
- oP24 — orthorhombic, primitive lattice, 24 atoms per conventional cell
- Symmetry operations
- 8 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Cl1 | Cl | 4c | 4 | 0.1330 | 0.2500 | 0.4480 |
| Cl2 | Cl | 4c | 4 | 0.4350 | 0.2500 | 0.3620 |
| Cl3 | Cl | 4c | 4 | 0.2770 | 0.2500 | 0.7090 |
| Cu4 | Cu | 4c | 4 | 0.2520 | 0.2500 | 0.3030 |
| K5 | K | 4c | 4 | 0.1720 | 0.2500 | 0.0200 |
| K6 | K | 4c | 4 | 0.5120 | 0.2500 | 0.8270 |
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 8 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
A3BC2_oP24_62_3c_c_2c-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP24, then the space-group number 62, then the Wyckoff letters occupied by each element in turn (Cl: 4c; Cl: 4c; Cl: 4c; Cu: 4c; K: 4c; K: 4c). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
Ba₂ZnS₃, Cs₂AgCl₃, Cs₂AgI₃ <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A3BC2_oP24_62_3c_c_2c-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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