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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 520 (1985), S. 51-58 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structure and Vibration Spectra of Cs2P2S6 and K2P2S6.Cs2P2S6 and K2P2S6 crystallize in the orthorhombic system, space group Immm, Z = 2 with the lattice constants \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm Cs}_{\rm 2} {\rm P}_{\rm 2} {\rm S}_{\rm 6} :{\rm a = 894,4(3) pm, b = 717,0(3)pm, c = 949,0(3) pm,}} \\ {{\rm K}_{\rm 2} {\rm P}_{\rm 2} {\rm S}_{\rm 6} :{\rm a = 832,5(3) pm, b = 686,4(3) pm, c = 915,4(3) pm}} \\ \end{array} $$\end{document}.The compounds are isotypic to Tl2P2S6. In the structure there are discrete P2S62- anions. Two PS4 tetrahedra are connected by a common edge to hexathiometadiphosphate groups. The far infrared, infrared, and Raman spectra of these compounds are assigned on the basis of P2S62- units with D2h symmetry in analogy to the isoelectronic Al2Cl6. The melting points are 440 ± 10°C for Cs2P2S6 and 508 ± 10°C for K2P2S6.
    Notes: Die neuen Verbindungen Cs2P2S6 und K2P2S6 kristallisieren orthorhombisch in der Raumgruppe Immm, Z = 2 mit den Gitterkonstanten \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm Cs}_{\rm 2} {\rm P}_{\rm 2} {\rm S}_{\rm 6} :{\rm a = 894,4(3) pm, b = 717,0(3)pm, c = 949,0(3) pm,}} \\ {{\rm K}_{\rm 2} {\rm P}_{\rm 2} {\rm S}_{\rm 6} :{\rm a = 832,5(3) pm, b = 686,4(3) pm, c = 915,4(3) pm}} \\ \end{array} $$\end{document} und sind dem Tl2P2S2 isotyp. Sie enthalten diskrete P2S22--Anionen als Baugruppen. Zwei PS4-Tetraeder sind über eine gemeinsame Kante zum Hezathiometadiphosphat-Anion P2S22- -verknüpft.Die FIR/IR- und Ramanspektren dieser Verbindungen konnten auf der Basis der P2S22--Enheiten mit D2h-Symmetrie in Analogie zum isoelektronischen Al2Cl6 zugeordnet werden. die Schmelzpunkte ergaben sich für Cs2P2S6 zu 440±10°C und Für K2S2S6 zu 508±10°C.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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