Crystal Lab › Prototype structures › Orthorhombic
SrUO₄
Orthorhombic · space group Pbcm (No. 57) · Pearson oP24
Symmetry elements and Wyckoff positions (interactive)
SrUO₄ in Pbcm
SettingUnit cell
- Lattice constants
- a = 5.490 Å, b = 7.977 Å, c = 8.130 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 356.0 ų
- Atoms in the conventional cell
- 24 (U 4, O 16, Sr 4)
- Formula units Z
- 4
- Pearson symbol
- oP24 — orthorhombic, primitive lattice, 24 atoms per conventional cell
- Symmetry operations
- 8 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| U5 | U | 4a | 4 | 0.0000 | 0.0000 | 0.0000 |
| O1 | O | 4c | 4 | 0.1726 | 0.2500 | 0.0000 |
| O2 | O | 4d | 4 | 0.8602 | 0.0300 | 0.2500 |
| Sr4 | Sr | 4d | 4 | 0.4710 | 0.2013 | 0.2500 |
| O3 | O | 8e | 8 | 0.2998 | 0.9193 | 0.0810 |
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 24 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
A4BC_oP24_57_cde_d_a-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP24, then the space-group number 57, then the Wyckoff letters occupied by each element in turn (U: 4a; O: 4c; O: 4d; Sr: 4d; O: 8e). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
BaUO₄, CsFeF₄, RbFeF₄ <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A4BC_oP24_57_cde_d_a-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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