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
SettingUnit 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
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| P5 | P | 8a | 8 | 0.0000 | 0.0000 | 0.0000 |
| P6 | P | 8c | 8 | 0.2400 | 0.0000 | 0.2500 |
| P7 | P | 8d | 8 | 0.2500 | 0.1900 | 0.0000 |
| P8 | P | 8e | 8 | 0.0000 | 0.2500 | 0.2000 |
| Al1 | Al | 16f | 16 | 0.1210 | 0.1000 | 0.1290 |
| Li2 | Li | 16f | 16 | 0.1620 | 0.3700 | 0.1000 |
| Li3 | Li | 16f | 16 | 0.1000 | 0.1620 | 0.3700 |
| Li4 | Li | 16f | 16 | 0.8700 | 0.6000 | 0.6620 |
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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