Semseyite

Pb₉S₂₁Sb₈

Kohatsu, J. J.Wuensch, B. J.

American Mineralogist (1974) 59, 1127-1127

a=13.603Å   b=11.936Å   c=24.453Å

α=90°   β=106.047°   γ=90°