Cu₇Bi₆S₁₀Cl₅ – Mobile Copper(I) Cations Inside Dendritic Channels of a Rigid Framework

Michael Ruck (1) , Andreas Heerwig (2)

1 Fachrichtung Chemie und Lebensmittelchemie
2 Fachrichtung Chemie und Lebensmittelchemie

The melting reaction of Cu, CuCl, S, and Bi₂S₃ yields black, shiny needles of the sulfide chloride Cu₇Bi₆S₁₀Cl₅. The compound decomposes peritectically above 639(5) K. Cu-K-XANES data confirm the oxidation state +I of Cu. Cu₇Bi₆S₁₀Cl₅ crystallizes in the monoclinic space group C2/m with a = 2878.3(9) pm, b = 396.59(9) pm, c = 1156.5(4) pm, and β = 111.55(3) ° at T = 293(2) K. Three S and four Cl anions coordinate each of the three independent Bi cations in the shape of mono-capped trigonal prisms. The [BiS₃Cl₄] polyhedra share edges and faces resulting in furrowed layers parallel (-201). Localized as well as disordered Cu cations occupy trigonal or tetrahedral voids in the packing of anions. The Joint Probability Density Function (JPDF) reveals branched and unbranched continuous pathways along [010], which are available for cation conduction.

Mots clés: Physical Sciences

Michael Ruck, Andreas Heerwig. Cu₇Bi₆S₁₀Cl₅ – Mobile Copper(I) Cations Inside Dendritic Channels of a Rigid Framework. Journal of Inorganic and General Chemistry / Zeitschrift für anorganische und allgemeine Chemie, 2010, 636 (9-10), pp.1860. ⟨10.1002/zaac.201000040⟩. ⟨hal-00552448⟩