Crystal Lab › Prototype structures › Tetragonal
BaNiSn₃
Tetragonal · space group I4mm (No. 107) · Pearson tI10
Symmetry elements and Wyckoff positions (interactive)
BaNiSn₃ in I4mm
SettingUnit cell
- Lattice constants
- a = 4.820 Å, b = 4.820 Å, c = 10.930 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 253.9 ų
- Atoms in the conventional cell
- 10 (Ba 2, Ni 2, Sn 6)
- Formula units Z
- 2
- Pearson symbol
- tI10 — tetragonal, body-centred lattice, 10 atoms per conventional cell
- Symmetry operations
- 16 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Ba1 | Ba | 2a | 2 | 0.0000 | 0.0000 | 0.0000 |
| Ni2 | Ni | 2a | 2 | 0.0000 | 0.0000 | 0.6554 |
| Sn3 | Sn | 2a | 2 | 0.0000 | 0.0000 | 0.4241 |
| Sn4 | Sn | 4b | 4 | 0.0000 | 0.5000 | 0.2516 |
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 10 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
ABC3_tI10_107_a_a_ab-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol tI10, then the space-group number 107, then the Wyckoff letters occupied by each element in turn (Ba: 2a; Ni: 2a; Sn: 2a; Sn: 4b). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
BaPdSn₃, BaPtSn₃, CeCuAl₃, EuPdGe₃, EuRhGe₃, LaOsSb₃, SrIrAl₃, SrNiSn₃, SrPdAl₃, SrPtAl₃ <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry ABC3_tI10_107_a_a_ab-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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