Crystal Lab › Prototype structures › Orthorhombic
CNCl
Orthorhombic · space group Pmmn (No. 59) · Pearson oP6
Symmetry elements and Wyckoff positions (interactive)
CNCl in Pmmn
SettingUnit cell
- Lattice constants
- a = 5.680 Å, b = 3.980 Å, c = 5.740 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 129.8 ų
- Atoms in the conventional cell
- 6 (C 2, Cl 2, N 2)
- Formula units Z
- 2
- Pearson symbol
- oP6 — orthorhombic, primitive lattice, 6 atoms per conventional cell
- Symmetry operations
- 8 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| C1 | C | 2a | 2 | 0.2500 | 0.2500 | 0.1499 |
| Cl2 | Cl | 2a | 2 | 0.2500 | 0.2500 | 0.4237 |
| N3 | N | 2a | 2 | 0.2500 | 0.2500 | 0.6255 |
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 8 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
ABC_oP6_59_a_a_a-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP6, then the space-group number 59, then the Wyckoff letters occupied by each element in turn (C: 2a; Cl: 2a; N: 2a). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry ABC_oP6_59_a_a_a-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.
← θ-Zr₂CuAu — AuCuZr₂ · Space group Pmmn (11 prototypes) · All prototypes · FeOCl (E0₅) →