Rh₂₀Si₁₃

Unit cell

Lattice constants

a = 11.851 Å, b = 11.851 Å, c = 3.623 Å; α = 90.00°, β = 90.00°, γ = 120.00°

Cell volume

440.7 ų

Atoms in the conventional cell

34 (Si 14, Rh 20)

Formula units Z

2

Pearson symbol

hP34 — hexagonal / trigonal, primitive lattice, 34 atoms per conventional cell

Symmetry operations

12 per cell

Crystallographic sites

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 34 atoms drawn above are these sites multiplied by all 12 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

A10B7_hP34_176_c3h_b2h-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol hP34, then the space-group number 176, then the Wyckoff letters occupied by each element in turn (Si: 2b; Rh: 2c; Rh: 6h; Rh: 6h; Rh: 6h; Si: 6h; Si: 6h). 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 A10B7_hP34_176_c3h_b2h-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.