Crystal Lab › Prototype structures › Orthorhombic
RhMnBi₃
Orthorhombic · space group Cmmm (No. 65) · Pearson oC20
Symmetry elements and Wyckoff positions (interactive)
RhMnBi₃ in Cmmm
SettingUnit cell
- Lattice constants
- a = 13.696 Å, b = 8.885 Å, c = 4.131 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 502.7 ų
- Atoms in the conventional cell
- 20 (Mn 4, Bi 12, Rh 4)
- Formula units Z
- 4
- Pearson symbol
- oC20 — orthorhombic, base-centred lattice, 20 atoms per conventional cell
- Symmetry operations
- 16 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Mn3 | Mn | 2a | 2 | 0.0000 | 0.0000 | 0.0000 |
| Mn4 | Mn | 2c | 2 | 0.5000 | 0.0000 | 0.5000 |
| Bi1 | Bi | 4g | 4 | 0.3369 | 0.0000 | 0.0000 |
| Rh5 | Rh | 4i | 4 | 0.0000 | 0.3016 | 0.0000 |
| Bi2 | Bi | 8q | 8 | 0.1240 | 0.1945 | 0.5000 |
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 20 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
A3BC_oC20_65_gq_ac_i-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oC20, then the space-group number 65, then the Wyckoff letters occupied by each element in turn (Mn: 2a; Mn: 2c; Bi: 4g; Rh: 4i; Bi: 8q). 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 A3BC_oC20_65_gq_ac_i-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.
← SmNiGe₃ · Space group Cmmm (19 prototypes) · All prototypes · 247 Superconductor (Y₂Ba₄Cu₇O₁₅) →