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Crystal Lab › Prototype structures › Monoclinic

β-Tl₂TeO₃ O₃TeTl₂

Monoclinic · space group P121/c1 (No. 14) · Pearson mP24

Symmetry elements and Wyckoff positions (interactive)

β-Tl₂TeO₃ in P121/c1

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

Unit cell

Lattice constants
a = 8.975 Å, b = 4.853 Å, c = 11.884 Å; α = 90.00°, β = 109.67°, γ = 90.00°
Cell volume
487.5 ų
Atoms in the conventional cell
24 (O 12, Te 4, Tl 8)
Formula units Z
4
Pearson symbol
mP24 — monoclinic, primitive lattice, 24 atoms per conventional cell
Symmetry operations
4 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
O1O4e40.38430.70000.1583
O2O4e40.09330.69700.2015
O3O4e40.17040.13500.0739
Te4Te4e40.16770.75030.0750
Tl5Tl4e40.49480.23520.1160
Tl6Tl4e40.81060.73220.1867

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 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

A3BC2_mP24_14_3e_e_2e-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol mP24, then the space-group number 14, then the Wyckoff letters occupied by each element in turn (O: 4e; O: 4e; O: 4e; Te: 4e; Tl: 4e; Tl: 4e). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Note: \beta-Tl₂TeO₃.

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A3BC2_mP24_14_3e_e_2e-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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