Crystal Lab › Prototype structures › Orthorhombic
LiCuVO₄
Orthorhombic · space group Imma (No. 74) · Pearson oI28
Symmetry elements and Wyckoff positions (interactive)
LiCuVO₄ in Imma
SettingUnit cell
- Lattice constants
- a = 5.662 Å, b = 5.809 Å, c = 8.758 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 288.1 ų
- Atoms in the conventional cell
- 28 (Cu 4, Li 4, V 4, O 16)
- Formula units Z
- 4
- Pearson symbol
- oI28 — orthorhombic, body-centred lattice, 28 atoms per conventional cell
- Symmetry operations
- 16 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Cu1 | Cu | 4a | 4 | 0.0000 | 0.0000 | 0.0000 |
| Li2 | Li | 4c | 4 | 0.2500 | 0.2500 | 0.2500 |
| V5 | V | 4e | 4 | 0.0000 | 0.2500 | 0.6140 |
| O3 | O | 8h | 8 | 0.0000 | 0.5164 | 0.2748 |
| O4 | O | 8i | 8 | 0.7352 | 0.2500 | 0.4993 |
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 28 atoms drawn above are these sites multiplied by all 16 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
ABC4D_oI28_74_a_c_hi_e-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oI28, then the space-group number 74, then the Wyckoff letters occupied by each element in turn (Cu: 4a; Li: 4c; V: 4e; O: 8h; O: 8i). 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 ABC4D_oI28_74_a_c_hi_e-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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