Crystal Lab › Prototype structures › Monoclinic
SbAsO₂
Monoclinic · space group P121/m1 (No. 11) · Pearson mP12
Symmetry elements and Wyckoff positions (interactive)
SbAsO₂ in P121/m1
SettingUnit cell
- Lattice constants
- a = 4.794 Å, b = 6.925 Å, c = 5.307 Å; α = 90.00°, β = 93.55°, γ = 90.00°
- Cell volume
- 175.8 ų
- Atoms in the conventional cell
- 12 (As 2, O 8, Sb 2)
- Formula units Z
- 2
- Pearson symbol
- mP12 — monoclinic, primitive lattice, 12 atoms per conventional cell
- Symmetry operations
- 4 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| As1 | As | 2e | 2 | 0.2828 | 0.2500 | 0.8899 |
| O2 | O | 2e | 2 | 0.1652 | 0.2500 | 0.1810 |
| O3 | O | 2e | 2 | 0.6301 | 0.2500 | 0.9625 |
| Sb5 | Sb | 2e | 2 | 0.7933 | 0.2500 | 0.3218 |
| O4 | O | 4f | 4 | 0.1931 | 0.0625 | 0.7153 |
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 12 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
AB4C_mP12_11_e_2ef_e-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol mP12, then the space-group number 11, then the Wyckoff letters occupied by each element in turn (As: 2e; O: 2e; O: 2e; Sb: 2e; O: 4f). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
SbPO₂ <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB4C_mP12_11_e_2ef_e-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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