Crystal Lab › Prototype structures › Monoclinic
CdCu(SeO₃)₂
Monoclinic · space group P121/c1 (No. 14) · Pearson mP40
Symmetry elements and Wyckoff positions (interactive)
CdCu(SeO₃)₂ in P121/c1
SettingUnit cell
- Lattice constants
- a = 10.840 Å, b = 10.394 Å, c = 7.257 Å; α = 90.00°, β = 136.27°, γ = 90.00°
- Cell volume
- 565.2 ų
- Atoms in the conventional cell
- 40 (Cd 4, Cu 4, O 24, Se 8)
- Formula units Z
- 4
- Pearson symbol
- mP40 — monoclinic, primitive lattice, 40 atoms per conventional cell
- Symmetry operations
- 4 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Cd1 | Cd | 4e | 4 | 0.7396 | 0.4503 | 0.7530 |
| Cu2 | Cu | 4e | 4 | 0.6835 | 0.4181 | 0.1604 |
| O3 | O | 4e | 4 | 0.1315 | 0.5144 | 0.8010 |
| O4 | O | 4e | 4 | 0.9866 | 0.6382 | 0.9106 |
| O5 | O | 4e | 4 | 0.7882 | 0.4890 | 0.5005 |
| O6 | O | 4e | 4 | 0.4567 | 0.3802 | 0.0289 |
| O7 | O | 4e | 4 | 0.6390 | 0.2109 | 0.4177 |
| O8 | O | 4e | 4 | 0.4523 | 0.3861 | 0.3836 |
| Se9 | Se | 4e | 4 | 0.9468 | 0.6071 | 0.6443 |
| Se10 | Se | 4e | 4 | 0.4324 | 0.2799 | 0.1862 |
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 40 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
ABC6D2_mP40_14_e_e_6e_2e-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol mP40, then the space-group number 14, then the Wyckoff letters occupied by each element in turn (Cd: 4e; Cu: 4e; O: 4e; O: 4e; O: 4e; O: 4e; O: 4e; O: 4e; Se: 4e; Se: 4e). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
HgCu(SeO₃)₂ <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry ABC6D2_mP40_14_e_e_6e_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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