Quenstedtite

Fe₂H₂₂O₂₃S₃

Thomas, J. N.Robinson, P. D.Fang, J. H.

American Mineralogist (1974) 59, 582-586

a=6.184Å   b=23.60Å   c=6.539Å

α=94.18°   β=101.73°   γ=96.27°