Langite

Cu₄H₁₀O₁₂S

Galy, J.Jaud, J.Pulou, R.Sempere, R.

Bulletin de Mineralogie (1984) 107, 641-648

a=7.118Å   b=6.034Å   c=11.209Å

α=90°   β=90.02°   γ=90°