Th₂Ni₁₇

Unit cell

Lattice constants

a = 8.370 Å, b = 8.370 Å, c = 8.140 Å; α = 90.00°, β = 90.00°, γ = 120.00°

Cell volume

493.9 ų

Atoms in the conventional cell

38 (Th 4, Ni 34)

Formula units Z

2

Pearson symbol

hP38 — hexagonal / trigonal, primitive lattice, 38 atoms per conventional cell

Symmetry operations

24 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 38 atoms drawn above are these sites multiplied by all 24 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

A17B2_hP38_194_fgjk_bc-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol hP38, then the space-group number 194, then the Wyckoff letters occupied by each element in turn (Th: 2b; Th: 2c; Ni: 4f; Ni: 6g; Ni: 12j; Ni: 12k). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

Ce₂Co₁₇, Ce₂Mg₁₇, Er₂Co₁₇, Gd₂Co₁₇, Gd₂Fe₁₇, Ho₂Co₁₇, β-Hf₂Be₁₇, La₂Fe₁₇, Lu₂Co₁₇, Nd₂Ni₁₇, Pr₂Co₁₇, Pu₂Co₁₇, Pu₂Ni₁₇, Sr₂Fe₁₇, Th₂Zn₁₇, β-Ti₂Be₁₇, Tm₂Co₁₇, U₂Zn₁₇, Y₂Co₁₇, Y₂Ni₁₇ <!--beginning with an

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A17B2_hP38_194_fgjk_bc-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.