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Crystal Lab › Prototype structures › Monoclinic

Ho₂S₃

Monoclinic · space group P121/m1 (No. 11) · Pearson mP30

Symmetry elements and Wyckoff positions (interactive)

Ho₂S₃ in P121/m1

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

Unit cell

Lattice constants
a = 10.150 Å, b = 4.002 Å, c = 17.500 Å; α = 90.00°, β = 80.60°, γ = 90.00°
Cell volume
701.3 ų
Atoms in the conventional cell
30 (Ho 12, S 18)
Formula units Z
6
Pearson symbol
mP30 — monoclinic, primitive lattice, 30 atoms per conventional cell
Symmetry operations
4 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Ho1Ho2e20.81060.25000.0208
Ho2Ho2e20.87580.25000.4300
Ho3Ho2e20.17080.25000.7806
Ho4Ho2e20.81280.25000.7203
Ho5Ho2e20.51330.25000.3981
Ho6Ho2e20.45060.25000.1156
S10S2e20.36280.25000.2808
S11S2e20.99190.25000.2689
S12S2e20.28920.25000.6306
S13S2e20.04940.25000.9239
S14S2e20.68080.25000.1825
S15S2e20.63220.25000.5319
S7S2e20.94690.25000.5756
S8S2e20.73170.25000.8731
S9S2e20.38330.25000.9672

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 30 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

A2B3_mP30_11_6e_9e-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol mP30, then the space-group number 11, then the Wyckoff letters occupied by each element in turn (Ho: 2e; Ho: 2e; Ho: 2e; Ho: 2e; Ho: 2e; Ho: 2e; S: 2e; S: 2e; S: 2e; S: 2e; S: 2e; S: 2e; S: 2e; S: 2e; S: 2e). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

Dy₂S₃, Er₂S₃, Tm₂S₃, Y₂S₃, δ-Yb₂S₃ <!--beginning with an

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A2B3_mP30_11_6e_9e-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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