Abstract
The quaternary title compound, caesium chromium(III) heptathiodiphosphate(V), CsCrP2S7, has been synthesized using the reactive halide flux method. It is isotypic with other AMP2S7 (A = alkali metal; M = Cr, V or In) structures and consists of two-dimensional ∞ 2[CrP2S7]− layers extending parallel to (001) which are separated from each other by Cs+ ions (symmetry 2). The layer is built up from slightly distorted octahedral [CrS6] units (symmetry 2) and bent [P2S7] units consisting of two corner-sharing [PS4] tetrahedra. The [CrS6] octahedra share two edges and two corners with the [PS4] tetrahedra. There are only van der Waals interactions present between the layers. The Cs+ ions are located in this van der Waals gap and stabilize the structure through weak ionic interactions. The classical charge balance of the title compound can be expressed as [Cs+][Cr3+][P5+]2[S2−]7.
Highlights
Heptathiodiphosphate(V), CsCrP2S7, has been synthesized using the reactive halide flux method
The Cs+ ions are located in this van der
Use was made of the X-ray facilities supported by the Ajou University
Summary
R factor = 0.029; wR factor = 0.073; data-to-parameter ratio = 24.4. Heptathiodiphosphate(V), CsCrP2S7, has been synthesized using the reactive halide flux method. AMP2S7 (A = alkali metal; M = Cr, V or In) structures and consists of two-dimensional 12[CrP2S7] layers extending parallel to (001) which are separated from each other by Cs+. The layer is built up from slightly distorted octahedral [CrS6] units (symmetry 2) and bent [P2S7] units consisting of two corner-sharing [PS4] tetrahedra. There are only van der Waals interactions present between the layers. The Cs+ ions are located in this van der. Waals gap and stabilize the structure through weak ionic interactions.
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