Crystal Lab › Prototype structures › Orthorhombic
β-NbPd₃
Orthorhombic · space group Pmmn (No. 59) · Pearson oP24
Symmetry elements and Wyckoff positions (interactive)
β-NbPd₃ in Pmmn
SettingUnit cell
- Lattice constants
- a = 5.486 Å, b = 13.600 Å, c = 4.845 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 361.5 ų
- Atoms in the conventional cell
- 24 (Nb 6, Pd 18)
- Formula units Z
- 6
- 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 |
|---|---|---|---|---|---|---|
| Nb1 | Nb | 2a | 2 | 0.2500 | 0.2500 | 0.0000 |
| Pd3 | Pd | 2b | 2 | 0.2500 | 0.7500 | 0.0000 |
| Nb2 | Nb | 4e | 4 | 0.2500 | 0.9167 | 0.6667 |
| Pd4 | Pd | 4e | 4 | 0.2500 | 0.0833 | 0.3333 |
| Pd5 | Pd | 4f | 4 | 0.0000 | 0.2500 | 0.5000 |
| Pd6 | Pd | 8g | 8 | 0.0000 | 0.9167 | 0.1667 |
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
AB3_oP24_59_ae_befg-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 59, then the Wyckoff letters occupied by each element in turn (Nb: 2a; Pd: 2b; Nb: 4e; Pd: 4e; Pd: 4f; Pd: 8g). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Note: \beta-NbPd₃.
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB3_oP24_59_ae_befg-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.
← Shcherbinaite (V₂O₅) Structure ( Revised ): A5B2_oP14_59_a2e_e-001 · Space group Pmmn (11 prototypes) · All prototypes · RbAlF₄ III — AlF₄Rb →