Acta Crystallographica Section E

Structure Reports Online

Volume 61, Part 3 (March 2005)

inorganic compounds

 

K₄Ta₄P₄S₂₄

A. Gutzmann, C. Näther and W. Bensch

Abstract: The quaternary tantalum thiophosphate K₄Ta₄P₄S₂₄ (tetrapotassium tetratantalum tetraphosphorus tetracosasulfide) was obtained by reacting elemental Ta with a melt formed in situ of K₂S₃, P₂S₅ and S. The crystal structure exhibits [Ta₄P₄S₂₄]^4- anionic layers, which consist of dimeric Ta₂S₁₁ units interconnected by PS₄ tetrahedra. The layers are stacked in an ABAB sequence in the direction of the crystallographic a axis and are separated by the K⁺ ions. The title compound is isostructural with A₄Ta₄P₄S₂₄ (A = Rb and Cs).

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