Crystal Lab › Prototype structures › Monoclinic
Monoclinic Averievite [(CsCl)Cu₅O₂(VO₄)₂]
Monoclinic · space group P121/c1 (No. 14) · Pearson mP40 · mineral: averievite
Symmetry elements and Wyckoff positions (interactive)
Monoclinic Averievite [(CsCl)Cu₅O₂(VO₄)₂] in P121/c1
SettingUnit cell
- Lattice constants
- a = 8.373 Å, b = 6.367 Å, c = 11.013 Å; α = 90.00°, β = 90.02°, γ = 90.00°
- Cell volume
- 587.1 ų
- Atoms in the conventional cell
- 40 (Cl 2, Cu 10, Cs 4, O 20, V 4)
- Formula units Z
- 2
- 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 |
|---|---|---|---|---|---|---|
| Cl1 | Cl | 2a | 2 | 0.0000 | 0.0000 | 0.0000 |
| Cu2 | Cu | 2c | 2 | 0.0000 | 0.0000 | 0.5000 |
| Cs3 | Cs | 4e | 4 | 0.4498 | 0.0005 | 0.9998 |
| Cu4 | Cu | 4e | 4 | 0.7293 | 0.5077 | 0.1664 |
| Cu5 | Cu | 4e | 4 | 0.9999 | 0.7725 | 0.2390 |
| O6 | O | 4e | 4 | 0.5007 | 0.5167 | 0.1685 |
| O7 | O | 4e | 4 | 0.9507 | 0.5096 | 0.1637 |
| O8 | O | 4e | 4 | 0.7626 | 0.6929 | 0.7441 |
| O9 | O | 4e | 4 | 0.7627 | 0.2254 | 0.2498 |
| O10 | O | 4e | 4 | 0.7545 | 0.0032 | 0.4751 |
| V11 | V | 4e | 4 | 0.3050 | 0.5096 | 0.1669 |
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
AB2C5D10E2_mP40_14_a_e_c2e_5e_e-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 (Cl: 2a; Cu: 2c; Cs: 4e; Cu: 4e; Cu: 4e; O: 4e; O: 4e; O: 4e; O: 4e; O: 4e; V: 4e). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Note: Averievite.
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB2C5D10E2_mP40_14_a_e_c2e_5e_e-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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