Crystal Lab › Prototype structures › Monoclinic
Ba₄Ir₃O₁₀
Monoclinic · space group P121/c1 (No. 14) · Pearson mP34
Symmetry elements and Wyckoff positions (interactive)
Ba₄Ir₃O₁₀ in P121/c1
SettingUnit cell
- Lattice constants
- a = 7.295 Å, b = 13.222 Å, c = 5.788 Å; α = 90.00°, β = 113.94°, γ = 90.00°
- Cell volume
- 510.2 ų
- Atoms in the conventional cell
- 34 (Ir 6, Br 8, O 20)
- Formula units Z
- 2
- Pearson symbol
- mP34 — monoclinic, primitive lattice, 34 atoms per conventional cell
- Symmetry operations
- 4 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Ir1 | Ir | 2a | 2 | 0.0000 | 0.0000 | 0.0000 |
| Br2 | Br | 4e | 4 | 0.9259 | 0.6387 | 0.9564 |
| Br3 | Br | 4e | 4 | 0.5198 | 0.6131 | 0.2558 |
| Ir4 | Ir | 4e | 4 | 0.2496 | 0.8505 | 0.1157 |
| O5 | O | 4e | 4 | 0.0647 | 0.1500 | 0.0468 |
| O6 | O | 4e | 4 | 0.7829 | 0.0291 | 0.1164 |
| O7 | O | 4e | 4 | 0.7829 | 0.0382 | 0.6585 |
| O8 | O | 4e | 4 | 0.4625 | 0.1531 | 0.7347 |
| O9 | O | 4e | 4 | 0.7638 | 0.2339 | 0.1777 |
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 34 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
A4B3C10_mP34_14_2e_ae_5e-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol mP34, then the space-group number 14, then the Wyckoff letters occupied by each element in turn (Ir: 2a; Br: 4e; Br: 4e; Ir: 4e; O: 4e; O: 4e; O: 4e; O: 4e; O: 4e). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
Ba₄Ru₃O₁₀ <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A4B3C10_mP34_14_2e_ae_5e-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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