Crystal Lab › Prototype structures › Monoclinic
β-NbPt₃
Monoclinic · space group P121/m1 (No. 11) · Pearson mP16
Symmetry elements and Wyckoff positions (interactive)
β-NbPt₃ in P121/m1
SettingUnit cell
- Lattice constants
- a = 4.870 Å, b = 5.530 Å, c = 9.258 Å; α = 90.00°, β = 79.38°, γ = 90.00°
- Cell volume
- 245.1 ų
- Atoms in the conventional cell
- 16 (Nb 4, Pt 12)
- Formula units Z
- 4
- Pearson symbol
- mP16 — monoclinic, primitive lattice, 16 atoms per conventional cell
- Symmetry operations
- 4 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Nb1 | Nb | 2e | 2 | 0.3750 | 0.2500 | 0.3750 |
| Nb2 | Nb | 2e | 2 | 0.2083 | 0.2500 | 0.8752 |
| Pt3 | Pt | 2e | 2 | 0.6250 | 0.2500 | 0.6250 |
| Pt4 | Pt | 2e | 2 | 0.7917 | 0.2500 | 0.1248 |
| Pt5 | Pt | 4f | 4 | 0.8750 | 0.0000 | 0.3750 |
| Pt6 | Pt | 4f | 4 | 0.7083 | 0.0000 | 0.8752 |
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 16 atoms drawn above are these sites multiplied by all 4 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_mP16_11_2e_2e2f-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol mP16, then the space-group number 11, then the Wyckoff letters occupied by each element in turn (Nb: 2e; Nb: 2e; Pt: 2e; Pt: 2e; Pt: 4f; Pt: 4f). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
TaPt₃ <!--beginning with an
Note: \beta-NbPt₃, HT.
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB3_mP16_11_2e_2e2f-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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