AM_Murmanite_1 Formula: Na2 Mn Ti3 (O22 Si4) H12 Name: Murmanite Unit cell: 5.5 7.0 11.94 96.0 100.433 88.916 , V=449.61 Space group: P1 (1)

Khalilov A D , Mamedov K S , Makarov E S , Pyanzina L A , Doklady Akademii Nauk SSSR , 161 (1965) p.1409-1411, Crystal structure of murmanite