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Crystal Lab › Prototype structures › Orthorhombic

Sr₃In₂P₄

Orthorhombic · space group Pnnm (No. 58) · Pearson oP18

Symmetry elements and Wyckoff positions (interactive)

Sr₃In₂P₄ in Pnnm

Setting
Loading the group…
x = 0.10, y = 0.17, z = 0.08

Unit 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

SiteElementWyckoffMultiplicityxyz
Sr1Sr2a20.00000.00000.0000
In2In4g40.58500.13350.0000
P3P4g40.43250.23950.0000
P4P4g40.16540.24540.0000
Sr5Sr4g40.19860.71460.0000

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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