Crystal Lab › Prototype structures › Orthorhombic
Orthorhombic LiFeO₂ (o-LiFeO₂)
Orthorhombic · space group Pmmn (No. 59) · Pearson oP8
Symmetry elements and Wyckoff positions (interactive)
Orthorhombic LiFeO₂ (o-LiFeO₂) in Pmmn
SettingUnit cell
- Lattice constants
- a = 4.061 Å, b = 2.962 Å, c = 6.032 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 72.6 ų
- Atoms in the conventional cell
- 8 (Fe 2, Li 2, O 4)
- Formula units Z
- 2
- Pearson symbol
- oP8 — orthorhombic, primitive lattice, 8 atoms per conventional cell
- Symmetry operations
- 8 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Fe1 | Fe | 2a | 2 | 0.2500 | 0.2500 | 0.6440 |
| Li2 | Li | 2a | 2 | 0.2500 | 0.2500 | 0.1090 |
| O3 | O | 2b | 2 | 0.2500 | 0.7500 | 0.8500 |
| O4 | O | 2b | 2 | 0.2500 | 0.7500 | 0.3910 |
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 8 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
ABC2_oP8_59_a_a_2b-004: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP8, then the space-group number 59, then the Wyckoff letters occupied by each element in turn (Fe: 2a; Li: 2a; O: 2b; O: 2b). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
LiMnO₂, NaMnO₂ <!--beginning with an
Note: o-LiFeO₂.
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry ABC2_oP8_59_a_a_2b-004 (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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