Skip to content

Crystal Lab › Prototype structures › Orthorhombic

Ta₂Ni₃Te₅

Orthorhombic · space group Pnma (No. 62) · Pearson oP40

Symmetry elements and Wyckoff positions (interactive)

Ta₂Ni₃Te₅ in Pnma

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

Unit cell

Lattice constants
a = 13.897 Å, b = 3.695 Å, c = 17.729 Å; α = 90.00°, β = 90.00°, γ = 90.00°
Cell volume
910.4 ų
Atoms in the conventional cell
40 (Ni 12, Ta 8, Te 20)
Formula units Z
4
Pearson symbol
oP40 — orthorhombic, primitive lattice, 40 atoms per conventional cell
Symmetry operations
8 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Ni1Ni4c40.30640.25000.1888
Ni2Ni4c40.30090.25000.7329
Ni3Ni4c40.75630.25000.5388
Ta4Ta4c40.25850.25000.3336
Ta5Ta4c40.25670.25000.5880
Te6Te4c40.88700.25000.6392
Te7Te4c40.37160.25000.4614
Te8Te4c40.88930.25000.4403
Te9Te4c40.61020.25000.7352
Te10Te4c40.61290.25000.3421

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 40 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

A3B2C5_oP40_62_3c_2c_5c-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP40, then the space-group number 62, then the Wyckoff letters occupied by each element in turn (Ni: 4c; Ni: 4c; Ni: 4c; Ta: 4c; Ta: 4c; Te: 4c; Te: 4c; Te: 4c; Te: 4c; Te: 4c). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

Ta₂Pd₃Te₅ <!--beginning with an

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A3B2C5_oP40_62_3c_2c_5c-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.

← RhCl₂(NH₃)₅Cl (J1₈)  ·  Space group Pnma (113 prototypes)  ·  All prototypes  ·  Approximate Cu₃(TeO₄)(SO₄)cdotH₂O →