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Crystal Lab › Prototype structures › Orthorhombic

Li₂CdSiO₄

Orthorhombic · space group Pnma (No. 62) · Pearson oP32

Symmetry elements and Wyckoff positions (interactive)

Li₂CdSiO₄ in Pnma

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

Unit cell

Lattice constants
a = 10.715 Å, b = 6.479 Å, c = 5.119 Å; α = 90.00°, β = 90.00°, γ = 90.00°
Cell volume
355.4 ų
Atoms in the conventional cell
32 (Cd 4, O 16, Si 4, Li 8)
Formula units Z
4
Pearson symbol
oP32 — orthorhombic, primitive lattice, 32 atoms per conventional cell
Symmetry operations
8 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Cd1Cd4c40.33730.25000.3255
O3O4c40.14650.25000.1495
O4O4c40.30710.25000.7549
Si6Si4c40.15730.25000.8324
Li2Li8d80.41000.50100.8270
O5O8d80.58960.04660.7890

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 32 atoms drawn above are these sites multiplied by all 8 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

AB2C4D_oP32_62_c_d_2cd_c-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP32, then the space-group number 62, then the Wyckoff letters occupied by each element in turn (Cd: 4c; O: 4c; O: 4c; Si: 4c; Li: 8d; O: 8d). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

Li₂CdPO₄, Li₂CoSiO₄, Li₂FeSiO₄, Li₂MnSiO₄, Li₂CdSiO₄, γ-Li₃PO₄ <!--beginning with an

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB2C4D_oP32_62_c_d_2cd_c-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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