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Crystal Lab › Prototype structures › Orthorhombic

Sb₂PbO₄

Orthorhombic · space group Pbam (No. 55) · Pearson oP14

Symmetry elements and Wyckoff positions (interactive)

Sb₂PbO₄ in Pbam

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

Unit cell

Lattice constants
a = 6.159 Å, b = 10.078 Å, c = 3.502 Å; α = 90.00°, β = 90.00°, γ = 90.00°
Cell volume
217.4 ų
Atoms in the conventional cell
14 (Pb 2, O 8, Sr 4)
Formula units Z
2
Pearson symbol
oP14 — orthorhombic, primitive lattice, 14 atoms per conventional cell
Symmetry operations
8 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Pb1Pb2a20.00000.00000.0000
O2O4g40.36000.31000.0000
O3O4h40.22000.05000.5000
Sr4Sr4h40.07700.31900.5000

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 14 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

A4BC2_oP14_55_gh_a_h-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP14, then the space-group number 55, then the Wyckoff letters occupied by each element in turn (Pb: 2a; O: 4g; O: 4h; Sr: 4h). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

Ca₂PbO₄, Ca₂SnO₄, Cd₂SnO₄, Li₂MgH₄, Mg₂SiO₄, Mn₂GeO₄, Na₂CdCl₄, Na₂MgCl₄, Na₂MnCl₄, Na₂UO₄, Sr₂CeO₄, Sr₂PrO₄ <!--beginning with an

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A4BC2_oP14_55_gh_a_h-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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