Skip to content

Crystal Lab › Prototype structures › Orthorhombic

K₂SnCl₄cdotH₂O

Orthorhombic · space group Pnma (No. 62) · Pearson oP32

Symmetry elements and Wyckoff positions (interactive)

K₂SnCl₄cdotH₂O in Pnma

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

Unit cell

Lattice constants
a = 12.050 Å, b = 9.140 Å, c = 8.240 Å; α = 90.00°, β = 90.00°, γ = 90.00°
Cell volume
907.5 ų
Atoms in the conventional cell
32 (Cl 16, H 4, Sn 4, K 8)
Formula units Z
4
Pearson symbol
oP32 — orthorhombic, primitive lattice, 32 atoms per conventional cell
Symmetry operations
8 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Cl1Cl4c40.30800.25000.8880
Cl2Cl4c40.76600.25000.0990
H4H4c40.54000.25000.4410
Sn6Sn4c40.51200.25000.0000
Cl3Cl8d80.44400.94800.2070
K5K8d80.68500.48200.3700

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 32 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

A4BC2D_oP32_62_2cd_c_d_c-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP32, then the space-group number 62, then the Wyckoff letters occupied by each element in turn (Cl: 4c; Cl: 4c; H: 4c; Sn: 4c; Cl: 8d; K: 8d). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A4BC2D_oP32_62_2cd_c_d_c-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.

← E3₅ (K₂SnCl₄cdotH₂O)  ·  Space group Pnma (113 prototypes)  ·  All prototypes  ·  β-Li₃PS₄ →