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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

Setting
Loading the group…
x = 0.10, y = 0.17, z = 0.08

Unit 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

SiteElementWyckoffMultiplicityxyz
As1As2e20.28280.25000.8899
O2O2e20.16520.25000.1810
O3O2e20.63010.25000.9625
Sb5Sb2e20.79330.25000.3218
O4O4f40.19310.06250.7153

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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