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Crystal Lab › Prototype structures › Orthorhombic

RbVSe₂

Orthorhombic · space group Fddd (No. 70) · Pearson oF64

Symmetry elements and Wyckoff positions (interactive)

RbVSe₂ in Fddd

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

Unit cell

Lattice constants
a = 24.181 Å, b = 5.672 Å, c = 13.648 Å; α = 90.00°, β = 90.00°, γ = 90.00°
Cell volume
1872.0 ų
Atoms in the conventional cell
64 (V 16, Rb 16, Se 32)
Formula units Z
16
Pearson symbol
oF64 — orthorhombic, face-centred lattice, 64 atoms per conventional cell
Symmetry operations
32 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
V3V8a80.12500.12500.1250
V4V8b80.12500.12500.6250
Rb1Rb16e160.30350.12500.1250
Se2Se32h320.57000.87100.0268

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 64 atoms drawn above are these sites multiplied by all 32 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

AB2C_oF64_70_e_h_ab-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oF64, then the space-group number 70, then the Wyckoff letters occupied by each element in turn (V: 8a; V: 8b; Rb: 16e; Se: 32h). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB2C_oF64_70_e_h_ab-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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