AM_Ershovite Formula: K3 Na4 (Fe.9 Mn.7 Ti.4) Si8 O28 H12 Name: Ershovite Unit cell: 10.244 11.924 5.276 103.491 96.96 91.945 , V=620.77 Space group: P-1 (2)

Rastsvetaeva R K , Rekhlova O Y , Khomyakov A P , Crystallography Reports , 36 (1991) p.500-503, Crystal structure of a new natural Na,K,Fe silicate, Locality: Khibiny massif, Kola peninsula, Russia