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Crystal Lab › Prototype structures › Orthorhombic

K₄[Mo(CN)₈]cdot 2H₂O (F2₁)

Orthorhombic · space group Pnma (No. 62) · Pearson oP108 · Strukturbericht F21

Symmetry elements and Wyckoff positions (interactive)

K₄[Mo(CN)₈]cdot 2H₂O (F2₁) in Pnma

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

Unit cell

Lattice constants
a = 16.696 Å, b = 11.609 Å, c = 8.680 Å; α = 90.00°, β = 90.00°, γ = 90.00°
Cell volume
1682.3 ų
Atoms in the conventional cell
108 (C 32, I 16, Mo 4, N 32, H 16, O 8)
Formula units Z
4
Pearson symbol
oP108 — orthorhombic, primitive lattice, 108 atoms per conventional cell
Symmetry operations
8 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
C1C4c40.06190.25000.3937
C2C4c40.14180.25000.8446
C3C4c40.21680.25000.3978
C4C4c40.26020.25000.6753
K10I4c40.46250.25000.5225
K9I4c40.36540.25000.0250
Mo12Mo4c40.13750.25000.5964
N13N4c40.02100.25000.2866
N14N4c40.26140.25000.2957
N15N4c40.32600.25000.7133
N16N4c40.64010.25000.5221
C5C8d80.03910.13880.6648
C6C8d80.17310.07250.5689
H7H8d80.34900.08000.3670
H8H8d80.41200.01700.3470
K11I8d80.14840.04760.1879
N17N8d80.01230.58090.2893
N18N8d80.30680.02160.0500
O19O8d80.38880.05930.4090

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 108 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

A8B4C4DE8F2_oP108_62_4c2d_2d_2cd_c_4c2d_d-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP108, then the space-group number 62, then the Wyckoff letters occupied by each element in turn (C: 4c; C: 4c; C: 4c; C: 4c; I: 4c; I: 4c; Mo: 4c; N: 4c; N: 4c; N: 4c; N: 4c; C: 8d; C: 8d; H: 8d; H: 8d; I: 8d; N: 8d; N: 8d; O: 8d). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Note: F2₁.

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A8B4C4DE8F2_oP108_62_4c2d_2d_2cd_c_4c2d_d-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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