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Crystal Lab › Prototype structures › Orthorhombic

Orthorhombic ClF₃

Orthorhombic · space group Pnma (No. 62) · Pearson oP16

Symmetry elements and Wyckoff positions (interactive)

Orthorhombic ClF₃ in Pnma

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

Unit cell

Lattice constants
a = 8.820 Å, b = 6.090 Å, c = 4.520 Å; α = 90.00°, β = 90.00°, γ = 90.00°
Cell volume
242.8 ų
Atoms in the conventional cell
16 (Cl 4, F 12)
Formula units Z
4
Pearson symbol
oP16 — orthorhombic, primitive lattice, 16 atoms per conventional cell
Symmetry operations
8 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Cl1Cl4c40.15820.25000.3790
F2F4c40.04220.25000.1010
F3F8d80.15170.53150.3634

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 16 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

AB3_oP16_62_c_cd-005: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP16, then the space-group number 62, then the Wyckoff letters occupied by each element in turn (Cl: 4c; F: 4c; F: 8d). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Note: Orthorhombic ClF₃.

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB3_oP16_62_c_cd-005 (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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