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Crystal Lab › Prototype structures › Orthorhombic

FeSb₂

Orthorhombic · space group Pnn2 (No. 34) · Pearson oP6

Symmetry elements and Wyckoff positions (interactive)

FeSb₂ in Pnn2

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

Unit cell

Lattice constants
a = 5.833 Å, b = 6.538 Å, c = 3.197 Å; α = 90.00°, β = 90.00°, γ = 90.00°
Cell volume
121.9 ų
Atoms in the conventional cell
6 (Fe 2, Sb 4)
Formula units Z
2
Pearson symbol
oP6 — orthorhombic, primitive lattice, 6 atoms per conventional cell
Symmetry operations
4 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Fe1Fe2a20.00000.00000.5000
Sb2Sb4c40.68810.85650.0097

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 6 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

AB2_oP6_34_a_c-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP6, then the space-group number 34, then the Wyckoff letters occupied by each element in turn (Fe: 2a; Sb: 4c). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB2_oP6_34_a_c-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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