Crystal Lab › Prototype structures › Orthorhombic
K₂PdSe₁₀
Orthorhombic · space group I212121 (No. 24) · Pearson oI104
Symmetry elements and Wyckoff positions (interactive)
K₂PdSe₁₀ in I212121
SettingUnit cell
- Lattice constants
- a = 12.885 Å, b = 15.922 Å, c = 15.872 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 3256.2 ų
- Atoms in the conventional cell
- 104 (Pd 8, K 16, Se 80)
- Formula units Z
- 8
- Pearson symbol
- oI104 — orthorhombic, body-centred lattice, 104 atoms per conventional cell
- Symmetry operations
- 8 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Pd3 | Pd | 4a | 4 | 0.3759 | 0.0000 | 0.2500 |
| Pd4 | Pd | 4a | 4 | 0.8755 | 0.0000 | 0.2500 |
| K1 | K | 8d | 8 | 0.3804 | 0.0981 | 0.6555 |
| K2 | K | 8d | 8 | 0.6202 | 0.9090 | 0.3467 |
| Se5 | Se | 8d | 8 | 0.1213 | 0.1432 | 0.8095 |
| Se6 | Se | 8d | 8 | 0.0895 | 0.2379 | 0.7010 |
| Se7 | Se | 8d | 8 | 0.1277 | 0.0591 | 0.6068 |
| Se8 | Se | 8d | 8 | 0.1587 | 0.9514 | 0.5115 |
| Se9 | Se | 8d | 8 | 0.8806 | 0.8461 | 0.2387 |
| Se10 | Se | 8d | 8 | 0.8198 | 0.1940 | 0.3931 |
| Se11 | Se | 8d | 8 | 0.9627 | 0.1822 | 0.4858 |
| Se12 | Se | 8d | 8 | 0.8712 | 0.0093 | 0.0954 |
| Se13 | Se | 8d | 8 | 0.4320 | 0.6438 | 0.5543 |
| Se14 | Se | 8d | 8 | 0.7888 | 0.7636 | 0.4322 |
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 104 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
A2BC10_oI104_24_2d_2a_10d-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oI104, then the space-group number 24, then the Wyckoff letters occupied by each element in turn (Pd: 4a; Pd: 4a; K: 8d; K: 8d; Se: 8d; Se: 8d; Se: 8d; Se: 8d; Se: 8d; Se: 8d; Se: 8d; Se: 8d; Se: 8d; Se: 8d). 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 A2BC10_oI104_24_2d_2a_10d-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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