Crystal Lab › Prototype structures › Orthorhombic
K₄[Mo(CN)₈]cdot 2H₂O (F2₁)
Orthorhombic · space group Pnma (No. 62) · Pearson oP108 · Strukturbericht F21
Symmetry elements and Wyckoff positions (interactive)
K₄[Mo(CN)₈]cdot 2H₂O (F2₁) in Pnma
SettingUnit cell
- Lattice constants
- a = 16.696 Å, b = 11.609 Å, c = 8.680 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 1682.3 ų
- Atoms in the conventional cell
- 108 (C 32, I 16, Mo 4, N 32, H 16, O 8)
- Formula units Z
- 4
- Pearson symbol
- oP108 — orthorhombic, primitive lattice, 108 atoms per conventional cell
- Symmetry operations
- 8 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| C1 | C | 4c | 4 | 0.0619 | 0.2500 | 0.3937 |
| C2 | C | 4c | 4 | 0.1418 | 0.2500 | 0.8446 |
| C3 | C | 4c | 4 | 0.2168 | 0.2500 | 0.3978 |
| C4 | C | 4c | 4 | 0.2602 | 0.2500 | 0.6753 |
| K10 | I | 4c | 4 | 0.4625 | 0.2500 | 0.5225 |
| K9 | I | 4c | 4 | 0.3654 | 0.2500 | 0.0250 |
| Mo12 | Mo | 4c | 4 | 0.1375 | 0.2500 | 0.5964 |
| N13 | N | 4c | 4 | 0.0210 | 0.2500 | 0.2866 |
| N14 | N | 4c | 4 | 0.2614 | 0.2500 | 0.2957 |
| N15 | N | 4c | 4 | 0.3260 | 0.2500 | 0.7133 |
| N16 | N | 4c | 4 | 0.6401 | 0.2500 | 0.5221 |
| C5 | C | 8d | 8 | 0.0391 | 0.1388 | 0.6648 |
| C6 | C | 8d | 8 | 0.1731 | 0.0725 | 0.5689 |
| H7 | H | 8d | 8 | 0.3490 | 0.0800 | 0.3670 |
| H8 | H | 8d | 8 | 0.4120 | 0.0170 | 0.3470 |
| K11 | I | 8d | 8 | 0.1484 | 0.0476 | 0.1879 |
| N17 | N | 8d | 8 | 0.0123 | 0.5809 | 0.2893 |
| N18 | N | 8d | 8 | 0.3068 | 0.0216 | 0.0500 |
| O19 | O | 8d | 8 | 0.3888 | 0.0593 | 0.4090 |
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 108 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
A8B4C4DE8F2_oP108_62_4c2d_2d_2cd_c_4c2d_d-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP108, then the space-group number 62, then the Wyckoff letters occupied by each element in turn (C: 4c; C: 4c; C: 4c; C: 4c; I: 4c; I: 4c; Mo: 4c; N: 4c; N: 4c; N: 4c; N: 4c; C: 8d; C: 8d; H: 8d; H: 8d; I: 8d; N: 8d; N: 8d; O: 8d). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Note: F2₁.
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A8B4C4DE8F2_oP108_62_4c2d_2d_2cd_c_4c2d_d-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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