Cu12As3VS16, eine neue Verbindung im System Sulvanit-Enargit

Cu₁₂As₃VS₁₆, a New Compound in the Sulvanite-Enargite System The compound Cu₁₂As₃VS₁₆ is formed by solid state reaction between Cu₃AsS₄ (enargite) and Cu₃VS₄ (sulvanite). The X-ray powder diagram shows a cubic pattern (a = 10.528 Å) but the compound exhibits a slight optical anisotropy. The specific resistivity of Cu₁₂As₃VS₁₆ is 10⁷ Ωcm, the Seebeck coefficient +390 μV/K. The i.r. spectrum has been measured. Mixed crystals and other compounds in the system enargite-sulvanite have not been observed.