Crystal Lab › Prototype structures › Tetragonal
IrIn₃
Tetragonal · space group P42/mnm (No. 136) · Pearson tP16
Symmetry elements and Wyckoff positions (interactive)
IrIn₃ in P42/mnm
SettingUnit cell
- Lattice constants
- a = 6.993 Å, b = 6.993 Å, c = 7.191 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 351.7 ų
- Atoms in the conventional cell
- 16 (In 12, Ir 4)
- Formula units Z
- 4
- Pearson symbol
- tP16 — tetragonal, primitive lattice, 16 atoms per conventional cell
- Symmetry operations
- 16 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| In1 | In | 4c | 4 | 0.0000 | 0.5000 | 0.0000 |
| Ir3 | Ir | 4f | 4 | 0.3452 | 0.3452 | 0.0000 |
| In2 | In | 8j | 8 | 0.1518 | 0.1518 | 0.2556 |
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 16 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
A3B_tP16_136_cj_f-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol tP16, then the space-group number 136, then the Wyckoff letters occupied by each element in turn (In: 4c; Ir: 4f; In: 8j). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
CoGa₃, CoIn₃, FeGa₃, OsGa₃, RhGa₃, RhIn₃, RuGa₃, RuIn₃ <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A3B_tP16_136_cj_f-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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