Crystal Lab › Prototype structures › Orthorhombic
Sr₃In₂P₄
Orthorhombic · space group Pnnm (No. 58) · Pearson oP18
Symmetry elements and Wyckoff positions (interactive)
Sr₃In₂P₄ in Pnnm
SettingUnit cell
- Lattice constants
- a = 16.323 Å, b = 6.828 Å, c = 4.289 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 478.0 ų
- Atoms in the conventional cell
- 18 (Sr 6, In 4, P 8)
- Formula units Z
- 2
- Pearson symbol
- oP18 — orthorhombic, primitive lattice, 18 atoms per conventional cell
- Symmetry operations
- 8 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Sr1 | Sr | 2a | 2 | 0.0000 | 0.0000 | 0.0000 |
| In2 | In | 4g | 4 | 0.5850 | 0.1335 | 0.0000 |
| P3 | P | 4g | 4 | 0.4325 | 0.2395 | 0.0000 |
| P4 | P | 4g | 4 | 0.1654 | 0.2454 | 0.0000 |
| Sr5 | Sr | 4g | 4 | 0.1986 | 0.7146 | 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 18 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
A2B4C3_oP18_58_g_2g_ag-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP18, then the space-group number 58, then the Wyckoff letters occupied by each element in turn (Sr: 2a; In: 4g; P: 4g; P: 4g; Sr: 4g). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
Ca₃In₂As₄, Eu₃In₂As₄, S₃N₂La₄, Sr₃In₂As₄, Sr₃In₂P₄ <!--beginning with an
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A2B4C3_oP18_58_g_2g_ag-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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