Crystal Lab › Prototype structures › Orthorhombic
CsFeS₂ (100K)
Orthorhombic · space group Immm (No. 71) · Pearson oI16
Symmetry elements and Wyckoff positions (interactive)
CsFeS₂ (100K) in Immm
SettingUnit cell
- Lattice constants
- a = 11.850 Å, b = 5.420 Å, c = 7.090 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 455.4 ų
- Atoms in the conventional cell
- 16 (Cs 4, S 8, Fe 4)
- Formula units Z
- 4
- Pearson symbol
- oI16 — orthorhombic, body-centred lattice, 16 atoms per conventional cell
- Symmetry operations
- 16 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Cs1 | Cs | 4e | 4 | 0.6700 | 0.0000 | 0.0000 |
| S4 | S | 4f | 4 | 0.8520 | 0.5000 | 0.0000 |
| Fe2 | Fe | 4g | 4 | 0.0000 | 0.2490 | 0.0000 |
| S3 | S | 4i | 4 | 0.0000 | 0.0000 | 0.7440 |
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 16 atoms drawn above are these sites multiplied by all 16 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
ABC2_oI16_71_e_g_fi-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oI16, then the space-group number 71, then the Wyckoff letters occupied by each element in turn (Cs: 4e; S: 4f; Fe: 4g; S: 4i). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
RbFeS₂ <!--beginning with an
Note: Stable above 100K.
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry ABC2_oI16_71_e_g_fi-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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