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Crystal Lab › Prototype structures › Monoclinic

Ce₇Pd₄Ge₂

Monoclinic · space group P121/c1 (No. 14) · Pearson mP52

Symmetry elements and Wyckoff positions (interactive)

Ce₇Pd₄Ge₂ in P121/c1

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

Unit cell

Lattice constants
a = 9.350 Å, b = 12.277 Å, c = 12.284 Å; α = 90.00°, β = 109.61°, γ = 90.00°
Cell volume
1328.4 ų
Atoms in the conventional cell
52 (Co 28, Ge 8, Pd 16)
Formula units Z
4
Pearson symbol
mP52 — monoclinic, primitive lattice, 52 atoms per conventional cell
Symmetry operations
4 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Co1Co4e40.36240.75180.0895
Co2Co4e40.63210.99890.1545
Co3Co4e40.36260.24680.0924
Co4Co4e40.64650.49860.1637
Co5Co4e40.00170.40110.0992
Co6Co4e40.99970.83870.1197
Co7Co4e40.99790.12010.1605
Ge8Ge4e40.85610.62280.0826
Ge9Ge4e40.14410.61990.1574
Pd10Pd4e40.29890.50030.0749
Pd11Pd4e40.25080.99930.0605
Pd12Pd4e40.72760.75360.1861
Pd13Pd4e40.72410.25110.1796

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 52 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

A7B2C4_mP52_14_7e_2e_4e-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol mP52, then the space-group number 14, then the Wyckoff letters occupied by each element in turn (Co: 4e; Co: 4e; Co: 4e; Co: 4e; Co: 4e; Co: 4e; Co: 4e; Ge: 4e; Ge: 4e; Pd: 4e; Pd: 4e; Pd: 4e; Pd: 4e). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

Pd₇Ge₄Co₂ <!--beginning with an

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A7B2C4_mP52_14_7e_2e_4e-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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