Crystal Lab › Prototype structures › Tetragonal
BaCo₂V₂O₈
Tetragonal · space group I41/acd (No. 142) · Pearson tI104
Symmetry elements and Wyckoff positions (interactive)
BaCo₂V₂O₈ in I41/acd
SettingUnit cell
- Lattice constants
- a = 12.419 Å, b = 12.419 Å, c = 8.466 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 1305.7 ų
- Atoms in the conventional cell
- 104 (Ba 8, V 16, Co 16, O 64)
- Formula units Z
- 8
- Pearson symbol
- tI104 — tetragonal, body-centred lattice, 104 atoms per conventional cell
- Symmetry operations
- 32 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Ba1 | Ba | 8a | 8 | 0.0000 | 0.2500 | 0.3750 |
| V5 | V | 16e | 16 | 0.0800 | 0.0000 | 0.2500 |
| Co2 | Co | 16f | 16 | 0.1689 | 0.4189 | 0.1250 |
| O3 | O | 32g | 32 | 0.1570 | 0.0740 | 0.3830 |
| O4 | O | 32g | 32 | 0.4980 | 0.0870 | 0.3470 |
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 104 atoms drawn above are these sites multiplied by all 32 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
AB2C8D2_tI104_142_a_f_2g_e-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol tI104, then the space-group number 142, then the Wyckoff letters occupied by each element in turn (Ba: 8a; V: 16e; Co: 16f; O: 32g; O: 32g). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
BaMg₂V₂O₈, BaMn₂V₂O₈, BaMo₂V₂O₈, BaV₂Co₂O₈, PbNi₂V₂O₈ <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB2C8D2_tI104_142_a_f_2g_e-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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