AM_Kalifersite Formula: (K3.6 Na1.4) Fe4.95 Mn.72 Mg.63 Ca.18 Si20 O68 H9.049 Name: Kalifersite Unit cell: 14.86 20.54 5.29 95.6 92.3 94.4 , V=1600.35 Space group: P-1 (2)

Ferraris G , Khomyakov A P , Belluso E , Soboleva S V , European Journal of Mineralogy , 10 (1998) p.865-874, Kalifersite, a new alkaline silicate from Kola Peninsula (Russia), based on a palygorskite-sepiolite polysomatic series, Locality: Kola Peninsula, Russia