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Crystal Lab › Prototype structures › Orthorhombic

NbIrTe₄

Orthorhombic · space group Pmn21 (No. 31) · Pearson oP24

Symmetry elements and Wyckoff positions (interactive)

NbIrTe₄ in Pmn21

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

Unit cell

Lattice constants
a = 3.768 Å, b = 12.486 Å, c = 13.077 Å; α = 90.00°, β = 90.00°, γ = 90.00°
Cell volume
615.2 ų
Atoms in the conventional cell
24 (Ir 4, Nb 4, Te 16)
Formula units Z
4
Pearson symbol
oP24 — orthorhombic, primitive lattice, 24 atoms per conventional cell
Symmetry operations
4 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Ir1Ir2a20.00000.53590.0000
Ir2Ir2a20.00000.75200.4921
Nb3Nb2a20.00000.05450.0050
Nb4Nb2a20.00000.26930.4923
Te10Te2a20.00000.67640.8464
Te11Te2a20.00000.85120.1095
Te12Te2a20.00000.89000.6494
Te5Te2a20.00000.06480.3894
Te6Te2a20.00000.19560.8527
Te7Te2a20.00000.34720.0961
Te8Te2a20.00000.41350.6394
Te9Te2a20.00000.56310.3959

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 24 atoms drawn above are these sites multiplied by all 4 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

ABC4_oP24_31_2a_2a_8a-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP24, then the space-group number 31, then the Wyckoff letters occupied by each element in turn (Ir: 2a; Ir: 2a; Nb: 2a; Nb: 2a; Te: 2a; Te: 2a; Te: 2a; Te: 2a; Te: 2a; Te: 2a; Te: 2a; Te: 2a). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

NbOsTe₄, TaIrTe₄, TaOsTe₄, TaRhTe₄, TaRuTe₄ <!--beginning with an

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry ABC4_oP24_31_2a_2a_8a-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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