Crystal Lab › Prototype structures › Orthorhombic
NbIrTe₄
Orthorhombic · space group Pmn21 (No. 31) · Pearson oP24
Symmetry elements and Wyckoff positions (interactive)
NbIrTe₄ in Pmn21
SettingUnit 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
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Ir1 | Ir | 2a | 2 | 0.0000 | 0.5359 | 0.0000 |
| Ir2 | Ir | 2a | 2 | 0.0000 | 0.7520 | 0.4921 |
| Nb3 | Nb | 2a | 2 | 0.0000 | 0.0545 | 0.0050 |
| Nb4 | Nb | 2a | 2 | 0.0000 | 0.2693 | 0.4923 |
| Te10 | Te | 2a | 2 | 0.0000 | 0.6764 | 0.8464 |
| Te11 | Te | 2a | 2 | 0.0000 | 0.8512 | 0.1095 |
| Te12 | Te | 2a | 2 | 0.0000 | 0.8900 | 0.6494 |
| Te5 | Te | 2a | 2 | 0.0000 | 0.0648 | 0.3894 |
| Te6 | Te | 2a | 2 | 0.0000 | 0.1956 | 0.8527 |
| Te7 | Te | 2a | 2 | 0.0000 | 0.3472 | 0.0961 |
| Te8 | Te | 2a | 2 | 0.0000 | 0.4135 | 0.6394 |
| Te9 | Te | 2a | 2 | 0.0000 | 0.5631 | 0.3959 |
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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