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Crystal Lab › Prototype structures › Trigonal

BaMo₆S₈

Trigonal · space group R-3 (No. 148) · Pearson hR15

Symmetry elements and Wyckoff positions (interactive)

BaMo₆S₈ in R-3

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

Unit cell

Lattice constants
a = 9.277 Å, b = 9.277 Å, c = 11.793 Å; α = 90.00°, β = 90.00°, γ = 120.00°
Cell volume
879.1 ų
Atoms in the conventional cell
45 (Ba 3, S 24, Mo 18)
Formula units Z
3
Pearson symbol
hR15 — hexagonal / trigonal, rhombohedral lattice, 15 atoms per conventional cell
Symmetry operations
18 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Ba1Ba3a30.00000.00000.0000
S3S6c60.00000.00000.2512
Mo2Mo18f180.15990.17120.4060
S4S18f180.97390.29350.4168

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 45 atoms drawn above are these sites multiplied by all 18 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

AB6C8_hR15_148_a_f_cf-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol hR15, then the space-group number 148, then the Wyckoff letters occupied by each element in turn (Ba: 3a; S: 6c; Mo: 18f; S: 18f). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

CaMo₆S₈, CeMo₆S₈, CeMo₆Se₈, EuMo₆S₈, LaMo₆S₈, LaMo₆Se₈, NdMo₆S₈, NdMo₆Se₈, PbMo₆S₈, PrMo₆S₈, PrMo₆Se₈, SmMo₆S₈, SmMo₆Se₈, SrMo₆S₈ <!--beginning with an

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB6C8_hR15_148_a_f_cf-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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