Crystal Lab › Prototype structures › Tetragonal
Mn₂Hg₅
Tetragonal · space group P4/mbm (No. 127) · Pearson tP14
Symmetry elements and Wyckoff positions (interactive)
Mn₂Hg₅ in P4/mbm
SettingUnit cell
- Lattice constants
- a = 9.758 Å, b = 9.758 Å, c = 2.998 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 285.5 ų
- Atoms in the conventional cell
- 14 (Hg 10, Mn 4)
- Formula units Z
- 2
- Pearson symbol
- tP14 — tetragonal, primitive lattice, 14 atoms per conventional cell
- Symmetry operations
- 16 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Hg1 | Hg | 2c | 2 | 0.0000 | 0.5000 | 0.5000 |
| Mn3 | Mn | 4g | 4 | 0.1800 | 0.6800 | 0.0000 |
| Hg2 | Hg | 8j | 8 | 0.0630 | 0.2040 | 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 14 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
A5B2_tP14_127_cj_g-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol tP14, then the space-group number 127, then the Wyckoff letters occupied by each element in turn (Hg: 2c; Mn: 4g; Hg: 8j). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
Ag₂Hg₅, Hf₂In₅, Li₂Sn₅, Mn₂Ga₅, Pd₂Hg₅, Ti₂In₅, V₂Ga₅, W₂Ga₅, Ti₃In₄ <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A5B2_tP14_127_cj_g-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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