Ruizite

Ca₂H₈Mn₂O₁₇Si₄

Fendrich, Kim V.Downs, Robert T.Origlieri, Marcus J.

Acta Crystallographica Section E (2016) 72, 7 959-963

a=9.0360(3)Å   b=6.1683(2)Å   c=11.9601(4)Å

α=90°   β=91.433(2)°   γ=90°