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Crystal Lab › Prototype structures › Orthorhombic

Rh₅Ge₃

Orthorhombic · space group Pbam (No. 55) · Pearson oP16

Symmetry elements and Wyckoff positions (interactive)

Rh₅Ge₃ in Pbam

Setting
Loading the group…
x = 0.10, y = 0.17, z = 0.08

Unit 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

SiteElementWyckoffMultiplicityxyz
Ge1Ge2a20.00000.00000.0000
Rh3Rh2c20.00000.50000.0000
Rh4Rh4g40.15200.22000.0000
Ge2Ge4h40.38800.15200.5000
Rh5Rh4h40.33000.39300.5000

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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