AM_Sonolite Formula: (Mn7.634 Mg.88 Ca.434 Fe.052) Si4 O18 H2 Name: Sonolite Unit cell: 4.872 10.669 14.287 100.3 90.0 90.0 , V=730.66 Space group: P21/B11 (14)

Kato T , Ito Y , Hashimoto N , Neues Jahrbuch fur Mineralogie, Monatshefte , 1989 (1989) p.410-430, The crystal structures of sonolite and jerrygibbsite, Locality: Hokkejino mine, Kyoto Prefecture, Honshu, Japan