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Crystal Lab › Prototype structures › Hexagonal

β-RuCl₃ Cl₃Ru

Hexagonal · space group P63cm (No. 185) · Pearson hP8

Symmetry elements and Wyckoff positions (interactive)

β-RuCl₃ in P63cm

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

Unit cell

Lattice constants
a = 6.120 Å, b = 6.120 Å, c = 5.658 Å; α = 90.00°, β = 90.00°, γ = 120.00°
Cell volume
183.5 ų
Atoms in the conventional cell
8 (Ru 2, Cl 6)
Formula units Z
2
Pearson symbol
hP8 — hexagonal / trigonal, primitive lattice, 8 atoms per conventional cell
Symmetry operations
12 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Ru2Ru2a20.00000.00000.0000
Cl1Cl6c60.30500.00000.2450

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 8 atoms drawn above are these sites multiplied by all 12 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

A3B_hP8_185_c_a-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol hP8, then the space-group number 185, then the Wyckoff letters occupied by each element in turn (Ru: 2a; Cl: 6c). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Note: \beta-RuCl₃.

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A3B_hP8_185_c_a-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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