Crystal Lab › Prototype structures › Orthorhombic
Nb₂Zr₆O₁₇
Orthorhombic · space group Ima2 (No. 46) · Pearson oI100
Symmetry elements and Wyckoff positions (interactive)
Nb₂Zr₆O₁₇ in Ima2
SettingUnit cell
- Lattice constants
- a = 40.920 Å, b = 4.930 Å, c = 5.270 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 1063.1 ų
- Atoms in the conventional cell
- 100 (Nb 8, O 68, Zr 24)
- Formula units Z
- 4
- Pearson symbol
- oI100 — orthorhombic, body-centred lattice, 100 atoms per conventional cell
- Symmetry operations
- 8 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Nb1 | Nb | 4a | 4 | 0.0000 | 0.0000 | 0.0000 |
| Nb2 | Nb | 4b | 4 | 0.2500 | 0.5151 | 0.5087 |
| O3 | O | 4b | 4 | 0.2500 | 0.3564 | 0.1537 |
| O10 | O | 8c | 8 | 0.5249 | 0.7973 | 0.6839 |
| O11 | O | 8c | 8 | 0.6419 | 0.8421 | 0.6826 |
| O4 | O | 8c | 8 | 0.6976 | 0.8485 | 0.9426 |
| O5 | O | 8c | 8 | 0.7195 | 0.3082 | 0.8110 |
| O6 | O | 8c | 8 | 0.6589 | 0.2925 | 0.8251 |
| O7 | O | 8c | 8 | 0.5956 | 0.2915 | 0.7785 |
| O8 | O | 8c | 8 | 0.5362 | 0.2505 | 0.8797 |
| O9 | O | 8c | 8 | 0.5827 | 0.7994 | 0.9251 |
| Zr12 | Zr | 8c | 8 | 0.5650 | 0.4848 | 0.0894 |
| Zr13 | Zr | 8c | 8 | 0.6278 | 0.0138 | 0.0136 |
| Zr14 | Zr | 8c | 8 | 0.6896 | 0.4849 | 0.0861 |
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 100 atoms drawn above are these sites multiplied by all 8 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
A2B17C6_oI100_46_ab_b8c_3c-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oI100, then the space-group number 46, then the Wyckoff letters occupied by each element in turn (Nb: 4a; Nb: 4b; O: 4b; O: 8c; O: 8c; O: 8c; O: 8c; O: 8c; O: 8c; O: 8c; O: 8c; Zr: 8c; Zr: 8c; Zr: 8c). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
Nb₂Hf₆O₁₇, Nb₂Zr₆O₁₇, Ta₂Hf₆O₁₇, Ta₂Zr₆O₁₇ <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A2B17C6_oI100_46_ab_b8c_3c-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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