Crystal Lab › Prototype structures › Orthorhombic
Re₃B
Orthorhombic · space group Cmcm (No. 63) · Pearson oC16
Symmetry elements and Wyckoff positions (interactive)
Re₃B in Cmcm
SettingUnit cell
- Lattice constants
- a = 2.890 Å, b = 9.313 Å, c = 7.258 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 195.3 ų
- Atoms in the conventional cell
- 16 (B 4, Re 12)
- Formula units Z
- 4
- Pearson symbol
- oC16 — orthorhombic, base-centred lattice, 16 atoms per conventional cell
- Symmetry operations
- 16 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| B1 | B | 4c | 4 | 0.0000 | 0.7440 | 0.2500 |
| Re2 | Re | 4c | 4 | 0.0000 | 0.4262 | 0.2500 |
| Re3 | Re | 8f | 8 | 0.0000 | 0.1345 | 0.0620 |
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 16 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
AB3_oC16_63_c_cf-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oC16, then the space-group number 63, then the Wyckoff letters occupied by each element in turn (B: 4c; Re: 4c; Re: 8f). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
BTc₃, CoPu₃ <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB3_oC16_63_c_cf-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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