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Crystal Lab › Prototype structures › Orthorhombic

Predicted Li₃AlP₂ AlLi₃P₂

Orthorhombic · space group Ibca (No. 73) · Pearson oI96

Symmetry elements and Wyckoff positions (interactive)

Predicted Li₃AlP₂ in Ibca

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

Unit cell

Lattice constants
a = 11.290 Å, b = 11.430 Å, c = 11.550 Å; α = 90.00°, β = 90.00°, γ = 90.00°
Cell volume
1490.5 ų
Atoms in the conventional cell
96 (P 32, Al 16, Li 48)
Formula units Z
16
Pearson symbol
oI96 — orthorhombic, body-centred lattice, 96 atoms per conventional cell
Symmetry operations
16 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
P5P8a80.00000.00000.0000
P6P8c80.24000.00000.2500
P7P8d80.25000.19000.0000
P8P8e80.00000.25000.2000
Al1Al16f160.12100.10000.1290
Li2Li16f160.16200.37000.1000
Li3Li16f160.10000.16200.3700
Li4Li16f160.87000.60000.6620

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 96 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

AB3C2_oI96_73_f_3f_acde-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oI96, then the space-group number 73, then the Wyckoff letters occupied by each element in turn (P: 8a; P: 8c; P: 8d; P: 8e; Al: 16f; Li: 16f; Li: 16f; Li: 16f). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

Li₃AlAs₂, Li₃Ga₂ <!--beginning with an

Note: Computational.

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB3C2_oI96_73_f_3f_acde-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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