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Crystal Lab › Prototype structures › Orthorhombic

LiCuVO₄

Orthorhombic · space group Imma (No. 74) · Pearson oI28

Symmetry elements and Wyckoff positions (interactive)

LiCuVO₄ in Imma

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

Unit 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

SiteElementWyckoffMultiplicityxyz
Cu1Cu4a40.00000.00000.0000
Li2Li4c40.25000.25000.2500
V5V4e40.00000.25000.6140
O3O8h80.00000.51640.2748
O4O8i80.73520.25000.4993

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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