Crystal Lab › Prototype structures › Tetragonal
Ni₄Mo (D1_{a})
Tetragonal · space group I4/m (No. 87) · Pearson tI10 · Strukturbericht D1a
Symmetry elements and Wyckoff positions (interactive)
Ni₄Mo (D1_{a}) in I4/m
SettingUnit cell
- Lattice constants
- a = 5.720 Å, b = 5.720 Å, c = 3.564 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 116.6 ų
- Atoms in the conventional cell
- 10 (Mo 2, Ni 8)
- Formula units Z
- 2
- Pearson symbol
- tI10 — tetragonal, body-centred lattice, 10 atoms per conventional cell
- Symmetry operations
- 16 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Mo1 | Mo | 2a | 2 | 0.0000 | 0.0000 | 0.0000 |
| Ni2 | Ni | 8h | 8 | 0.4000 | 0.8000 | 0.0000 |
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 10 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
AB4_tI10_87_a_h-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol tI10, then the space-group number 87, then the Wyckoff letters occupied by each element in turn (Mo: 2a; Ni: 8h). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
Ag₄Lu, Ag₄Sc, Au₄Cr, Au₄Er, Au₄Ho, Au₄Lu, Au₄Mn, Au₄Ti, Au₄V, Au₄Yb, Ni₄W <!--beginning with an
Note: D1_{a}.
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB4_tI10_87_a_h-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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