AM_Viitaniemiite Formula: Ca.592 Mn.401 Al Na P F2 O5 H Name: Viitaniemiite Unit cell: 5.457 7.151 6.836 90.0 109.36 90.0 , V=251.68 Space group: P121/M1 (11)

Pajunen A , Lahti S I , American Mineralogist , 69 (1984) p.961-966, The crystal structure of viitaniemiite, Locality: Viitaniemi pegmatite, Orivesi, southern Finland