Crystal Lab › Prototype structures › Hexagonal
Zn₂Mo₃O₈
Hexagonal · space group P63mc (No. 186) · Pearson hP26
Symmetry elements and Wyckoff positions (interactive)
Zn₂Mo₃O₈ in P63mc
SettingUnit cell
- Lattice constants
- a = 5.775 Å, b = 5.775 Å, c = 9.915 Å; α = 90.00°, β = 90.00°, γ = 120.00°
- Cell volume
- 286.4 ų
- Atoms in the conventional cell
- 26 (O 16, Zn 4, Mo 6)
- Formula units Z
- 2
- Pearson symbol
- hP26 — hexagonal / trigonal, primitive lattice, 26 atoms per conventional cell
- Symmetry operations
- 12 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| O2 | O | 2a | 2 | 0.0000 | 1.0000 | 0.3886 |
| O3 | O | 2b | 2 | 0.3333 | 0.6667 | 0.1470 |
| Zn6 | Zn | 2b | 2 | 0.3333 | 0.6667 | 0.9465 |
| Zn7 | Zn | 2b | 2 | 0.3333 | 0.6667 | 0.5132 |
| Mo1 | Mo | 6c | 6 | 0.1461 | 0.8539 | 0.2500 |
| O4 | O | 6c | 6 | 0.4861 | 0.5139 | 0.3639 |
| O5 | O | 6c | 6 | 0.1647 | 0.8353 | 0.6354 |
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 26 atoms drawn above are these sites multiplied by all 12 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
A3B8C2_hP26_186_c_ab2c_2b-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol hP26, then the space-group number 186, then the Wyckoff letters occupied by each element in turn (O: 2a; O: 2b; Zn: 2b; Zn: 2b; Mo: 6c; O: 6c; O: 6c). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
Cd₂Mo₃0₈, Co₂Mo₃0₈, Fe₂Mo₃0₈ (kamiokite), Mg₂Mo₃0₈, Mn₂Mo₃0₈, Ni₂Mo₃0₈ <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A3B8C2_hP26_186_c_ab2c_2b-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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