Crystal Lab › Prototype structures › Orthorhombic
RbVSe₂
Orthorhombic · space group Fddd (No. 70) · Pearson oF64
Symmetry elements and Wyckoff positions (interactive)
RbVSe₂ in Fddd
SettingUnit 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
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| V3 | V | 8a | 8 | 0.1250 | 0.1250 | 0.1250 |
| V4 | V | 8b | 8 | 0.1250 | 0.1250 | 0.6250 |
| Rb1 | Rb | 16e | 16 | 0.3035 | 0.1250 | 0.1250 |
| Se2 | Se | 32h | 32 | 0.5700 | 0.8710 | 0.0268 |
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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