Crystal Lab › Prototype structures › Orthorhombic
Rh₅Ge₃
Orthorhombic · space group Pbam (No. 55) · Pearson oP16
Symmetry elements and Wyckoff positions (interactive)
Rh₅Ge₃ in Pbam
SettingUnit cell
- Lattice constants
- a = 5.420 Å, b = 10.320 Å, c = 3.960 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 221.5 ų
- Atoms in the conventional cell
- 16 (Ge 6, Rh 10)
- Formula units Z
- 2
- Pearson symbol
- oP16 — orthorhombic, primitive lattice, 16 atoms per conventional cell
- Symmetry operations
- 8 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Ge1 | Ge | 2a | 2 | 0.0000 | 0.0000 | 0.0000 |
| Rh3 | Rh | 2c | 2 | 0.0000 | 0.5000 | 0.0000 |
| Rh4 | Rh | 4g | 4 | 0.1520 | 0.2200 | 0.0000 |
| Ge2 | Ge | 4h | 4 | 0.3880 | 0.1520 | 0.5000 |
| Rh5 | Rh | 4h | 4 | 0.3300 | 0.3930 | 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 16 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
A3B5_oP16_55_ah_cgh-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP16, then the space-group number 55, then the Wyckoff letters occupied by each element in turn (Ge: 2a; Rh: 2c; Rh: 4g; Ge: 4h; Rh: 4h). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
Pd₅Al₃, Pd₅Ga₃, Pd₅In₃, Pt₅Al₃, Rh₅Si₃ <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A3B5_oP16_55_ah_cgh-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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