Crystal Lab › Prototype structures › Cubic
Cu₃[Fe(CN)₆]₂cdot xH₂O (J2₅)
Cubic · space group Fm-3m (No. 225) · Pearson cF96 · Strukturbericht J25 · mineral: prussian blue analog
Symmetry elements and Wyckoff positions (interactive)
Cu₃[Fe(CN)₆]₂cdot xH₂O (J2₅) in Fm-3m
SettingUnit cell
- Lattice constants
- a = 10.120 Å, b = 10.120 Å, c = 10.120 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 1036.4 ų
- Atoms in the conventional cell
- 96 (Cu 36, Fe 4, H 8, C 24, N 24)
- Formula units Z
- 4
- Pearson symbol
- cF96 — cubic, face-centred lattice, 96 atoms per conventional cell
- Symmetry operations
- 192 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Cu2 | Cu | 4a | 4 | 0.0000 | 0.0000 | 0.0000 |
| Fe4 | Fe | 4b | 4 | 0.5000 | 0.5000 | 0.5000 |
| H5 | H | 8c | 8 | 0.2500 | 0.2500 | 0.2500 |
| C1 | C | 24e | 24 | 0.7026 | 0.0000 | 0.0000 |
| N6 | N | 24e | 24 | 0.8113 | 0.0000 | 0.0000 |
| Cu3 | Cu | 32f | 32 | 0.6667 | 0.6667 | 0.6667 |
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 96 atoms drawn above are these sites multiplied by all 192 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
A6B9CD2E6_cF96_225_e_af_b_c_e-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol cF96, then the space-group number 225, then the Wyckoff letters occupied by each element in turn (Cu: 4a; Fe: 4b; H: 8c; C: 24e; N: 24e; Cu: 32f). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
Cd₃[Co(CN)₆]₂, Co₃[Co(CN)₆]₂, Cu₃[Fe(CN)₆]₂, Fe₃[Fe(CN)₆]₂, Td₃[Fe(CN)₆]₂, Zn₃[Fe(CN)₆]₂ <!--beginning with an
Note: J2_5, Prussian Blue Analog.
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A6B9CD2E6_cF96_225_e_af_b_c_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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