Crystal Lab › Prototype structures › Tetragonal
Zr₃PD₃
Tetragonal · space group P42/nbc (No. 133) · Pearson tP64
Symmetry elements and Wyckoff positions (interactive)
Zr₃PD₃ in P42/nbc
SettingUnit cell
- Lattice constants
- a = 11.180 Å, b = 11.180 Å, c = 5.430 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 678.7 ų
- Atoms in the conventional cell
- 64 (P 8, Zr 24, D 32)
- Formula units Z
- 8
- Pearson symbol
- tP64 — tetragonal, primitive lattice, 64 atoms per conventional cell
- Symmetry operations
- 16 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| P3 | P | 8h | 8 | 0.5451 | 0.2500 | 0.0000 |
| Zr4 | Zr | 8i | 8 | 0.6108 | 0.2500 | 0.5000 |
| Zr5 | Zr | 8j | 8 | 0.6555 | 0.6555 | 0.2500 |
| Zr6 | Zr | 8j | 8 | 0.0560 | 0.0560 | 0.2500 |
| D1 | D | 16k | 16 | 0.9995 | 0.1050 | 0.5823 |
| D2 | D | 16k | 16 | 0.1813 | 0.1749 | 0.1338 |
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 64 atoms drawn above are these sites multiplied by all 16 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
A4BC3_tP64_133_2k_h_i2j-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol tP64, then the space-group number 133, then the Wyckoff letters occupied by each element in turn (P: 8h; Zr: 8i; Zr: 8j; Zr: 8j; D: 16k; D: 16k). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
Ti₃PD₃ <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A4BC3_tP64_133_2k_h_i2j-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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