Crystal Lab › Prototype structures › Tetragonal
CeCr₂Si₂C
Tetragonal · space group P4/mmm (No. 123) · Pearson tP6
Symmetry elements and Wyckoff positions (interactive)
CeCr₂Si₂C in P4/mmm
SettingUnit cell
- Lattice constants
- a = 4.014 Å, b = 4.014 Å, c = 5.287 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 85.2 ų
- Atoms in the conventional cell
- 6 (Ce 1, C 1, Cr 2, Si 2)
- Formula units Z
- 1
- Pearson symbol
- tP6 — tetragonal, primitive lattice, 6 atoms per conventional cell
- Symmetry operations
- 16 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Ce2 | Ce | 1a | 1 | 0.0000 | 0.0000 | 0.0000 |
| C1 | C | 1b | 1 | 0.0000 | 0.0000 | 0.5000 |
| Cr3 | Cr | 2e | 2 | 0.0000 | 0.5000 | 0.5000 |
| Si4 | Si | 2h | 2 | 0.5000 | 0.5000 | 0.2240 |
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 16 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
ABC2D2_tP6_123_b_a_e_h-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol tP6, then the space-group number 123, then the Wyckoff letters occupied by each element in turn (Ce: 1a; C: 1b; Cr: 2e; Si: 2h). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
CsV₂Se₂O, DyCr₂Si₂C, GdCr₂Si₂C, HoCr₂Si₂C, LaCr₂Si₂C, NdCr₂Si₂C, PrCr₂Si₂C, SmCr₂Si₂C, TbCr₂Si₂C, UCr₂Si₂C, YCr₂Si₂C <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry ABC2D2_tP6_123_b_a_e_h-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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