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Crystal Lab › Prototype structures › Tetragonal

Ti₅Te₄

Tetragonal · space group I4/m (No. 87) · Pearson tI18

Symmetry elements and Wyckoff positions (interactive)

Ti₅Te₄ in I4/m

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

Unit cell

Lattice constants
a = 10.164 Å, b = 10.164 Å, c = 3.772 Å; α = 90.00°, β = 90.00°, γ = 90.00°
Cell volume
389.7 ų
Atoms in the conventional cell
18 (Ti 10, Te 8)
Formula units Z
2
Pearson symbol
tI18 — tetragonal, body-centred lattice, 18 atoms per conventional cell
Symmetry operations
16 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Ti2Ti2a20.00000.00000.0000
Te1Te8h80.27970.94110.0000
Ti3Ti8h80.37520.68560.0000

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 18 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

A4B5_tI18_87_h_ah-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol tI18, then the space-group number 87, then the Wyckoff letters occupied by each element in turn (Ti: 2a; Te: 8h; Ti: 8h). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

Mo₅As₄, Nb₅Sb₄, Nb₅Se₄, Nb₅Te₄, Ta₅Sb₄, V₅S₄, V₅Se₄ <!--beginning with an

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A4B5_tI18_87_h_ah-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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