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Crystal Lab › Prototype structures › Tetragonal

BaCd₁₁

Tetragonal · space group I41/amd (No. 141) · Pearson tI48

Symmetry elements and Wyckoff positions (interactive)

BaCd₁₁ in I41/amd

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

Unit cell

Lattice constants
a = 12.020 Å, b = 12.020 Å, c = 7.740 Å; α = 90.00°, β = 90.00°, γ = 90.00°
Cell volume
1118.3 ų
Atoms in the conventional cell
48 (Cd 44, Ba 4)
Formula units Z
4
Pearson symbol
tI48 — tetragonal, body-centred lattice, 48 atoms per conventional cell
Symmetry operations
32 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Cd2Cd4a40.00000.75000.1250
Ba1Ba4b40.00000.25000.3750
Cd3Cd8c80.00000.00000.0000
Cd4Cd32i320.62300.95500.1830

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 48 atoms drawn above are these sites multiplied by all 32 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

AB11_tI48_141_b_aci-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol tI48, then the space-group number 141, then the Wyckoff letters occupied by each element in turn (Cd: 4a; Ba: 4b; Cd: 8c; Cd: 32i). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

CaZn₁₁, CeZn₁₁, EuCd₁₁, EuZn₁₁, LaZn₁₁, NdZn₁₁, PrZn₁₁, SrCd₁₁ <!--beginning with an

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB11_tI48_141_b_aci-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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