Crystal Lab › Prototype structures › Orthorhombic
CdPt₃ ( New L1₃)
Orthorhombic · space group Cmmm (No. 65) · Pearson oC8 · Strukturbericht L13
Symmetry elements and Wyckoff positions (interactive)
CdPt₃ ( New L1₃) in Cmmm
SettingUnit cell
- Lattice constants
- a = 5.821 Å, b = 7.873 Å, c = 2.873 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 131.6 ų
- Atoms in the conventional cell
- 8 (Cd 2, Pt 6)
- Formula units Z
- 2
- Pearson symbol
- oC8 — orthorhombic, base-centred lattice, 8 atoms per conventional cell
- Symmetry operations
- 16 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Cd1 | Cd | 2a | 2 | 0.0000 | 0.0000 | 0.0000 |
| Pt2 | Pt | 2b | 2 | 0.5000 | 0.0000 | 0.0000 |
| Pt3 | Pt | 4f | 4 | 0.2500 | 0.2500 | 0.5000 |
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 8 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
AB3_oC8_65_a_bf-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oC8, then the space-group number 65, then the Wyckoff letters occupied by each element in turn (Cd: 2a; Pt: 2b; Pt: 4f). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Note: L1₃.
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB3_oC8_65_a_bf-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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