Crystal Lab › Prototype structures › Orthorhombic
BaZnF₄
Orthorhombic · space group Cmc21 (No. 36) · Pearson oC24
Symmetry elements and Wyckoff positions (interactive)
BaZnF₄ in Cmc21
SettingUnit cell
- Lattice constants
- a = 4.197 Å, b = 14.546 Å, c = 5.839 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 356.5 ų
- Atoms in the conventional cell
- 24 (Ba 4, F 16, Zn 4)
- Formula units Z
- 4
- Pearson symbol
- oC24 — orthorhombic, base-centred lattice, 24 atoms per conventional cell
- Symmetry operations
- 8 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Ba1 | Ba | 4a | 4 | 0.0000 | 0.8524 | 0.4626 |
| F2 | F | 4a | 4 | 0.0000 | 0.3017 | 0.2003 |
| F3 | F | 4a | 4 | 0.0000 | 0.3326 | 0.7295 |
| F4 | F | 4a | 4 | 0.0000 | 0.4715 | 0.3241 |
| F5 | F | 4a | 4 | 0.0000 | 0.9227 | 0.0120 |
| Zn6 | Zn | 4a | 4 | 0.0000 | 0.4132 | 0.0000 |
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 24 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
AB4C_oC24_36_a_4a_a-002: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oC24, then the space-group number 36, then the Wyckoff letters occupied by each element in turn (Ba: 4a; F: 4a; F: 4a; F: 4a; F: 4a; Zn: 4a). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
BaCoF₄, BaCuF₄, BaFeF₄, BaMgF₄, BaMnF₄, BaNiF₄, BaWO₄, BiNbO₄, EuMgD₄, HfGeTe₄, LaTaO₄, NaAlH₄, NaOsO₄, SrMgD₄, SrMgF₄, ZrGeTe₄ <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB4C_oC24_36_a_4a_a-002 (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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