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Crystal Lab › Prototype structures › Monoclinic

CaSb₂

Monoclinic · space group P121/m1 (No. 11) · Pearson mP6

Symmetry elements and Wyckoff positions (interactive)

CaSb₂ in P121/m1

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

Unit cell

Lattice constants
a = 4.746 Å, b = 4.177 Å, c = 8.991 Å; α = 90.00°, β = 75.86°, γ = 90.00°
Cell volume
172.8 ų
Atoms in the conventional cell
6 (Ca 2, Sb 4)
Formula units Z
2
Pearson symbol
mP6 — monoclinic, primitive lattice, 6 atoms per conventional cell
Symmetry operations
4 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Ca1Ca2e20.84830.25000.7150
Sb2Sb2e20.22010.25000.9812
Sb3Sb2e20.59840.25000.3839

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 6 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

AB2_mP6_11_e_2e-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol mP6, then the space-group number 11, then the Wyckoff letters occupied by each element in turn (Ca: 2e; Sb: 2e; Sb: 2e). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

EuSb₂, SrSb₂ <!--beginning with an

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB2_mP6_11_e_2e-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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