Crystal Lab › Prototype structures › Orthorhombic
FeSb₂
Orthorhombic · space group Pnn2 (No. 34) · Pearson oP6
Symmetry elements and Wyckoff positions (interactive)
FeSb₂ in Pnn2
SettingUnit cell
- Lattice constants
- a = 5.833 Å, b = 6.538 Å, c = 3.197 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 121.9 ų
- Atoms in the conventional cell
- 6 (Fe 2, Sb 4)
- Formula units Z
- 2
- Pearson symbol
- oP6 — orthorhombic, primitive lattice, 6 atoms per conventional cell
- Symmetry operations
- 4 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Fe1 | Fe | 2a | 2 | 0.0000 | 0.0000 | 0.5000 |
| Sb2 | Sb | 4c | 4 | 0.6881 | 0.8565 | 0.0097 |
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 6 atoms drawn above are these sites multiplied by all 4 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
AB2_oP6_34_a_c-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP6, then the space-group number 34, then the Wyckoff letters occupied by each element in turn (Fe: 2a; Sb: 4c). 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 AB2_oP6_34_a_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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