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Zur Kristallstruktur der Thiocuprate K 3 Cu 8 S 6 und Rb 3 Cu 8 S 6 / On the Crystal Structure of the Thiocuprates K 3 Cu 8 S 6 and Rb 3 Cu 8 S 6

1979; De Gruyter; Volume: 34; Issue: 5 Linguagem: Inglês

10.1515/znb-1979-0505

1865-7117

Christian Burschka,

Solid-state spectroscopy and crystallography

Abstract The title compounds can be synthesized by fusion reaction of the alkali carbonates with copper and sulfur at 790 °C. The structure was solved from X-ray diffractometer data of single crystals and refined to an R-value of 0.06. The compounds crystallize with the same layer-type structure which is closely related to that of KCU 3 S 2 . Crystal data for K 3 Cu 8 S 6 (Rb 3 Cu 8 S 6 ): space group C2/m,z = 2, ϱ calc = 4.27(4.76) g/cm 3 , a = 17.332(4) (17.840(6)) Å, b = 3.830(2) (3.865(1)) Å, c = 9.889(4) (10.011(3)) Å, β = 104.12(2)° (104.91(2)°).