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Crystal Lab › Prototype structures › Orthorhombic

SrUO₄

Orthorhombic · space group Pbcm (No. 57) · Pearson oP24

Symmetry elements and Wyckoff positions (interactive)

SrUO₄ in Pbcm

Setting
Loading the group…
x = 0.10, y = 0.17, z = 0.08

Unit 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

SiteElementWyckoffMultiplicityxyz
U5U4a40.00000.00000.0000
O1O4c40.17260.25000.0000
O2O4d40.86020.03000.2500
Sr4Sr4d40.47100.20130.2500
O3O8e80.29980.91930.0810

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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