AM_Watatsumiite Formula: (K.95 Ba.05) Na2 Li (Mn1.569 Mg.431) (V1.66 Ti.34) Si8 O24 Name: Watatsumiite Unit cell: 16.45 12.492 9.995 90.0 115.32 90.0 , V=1856.59 Space group: C1C1 (9)

Matsubara S , Miyawaki R , Kurosawa M , Suzuki Y , Journal of Mineralogical and Petrological Sciences , 98 (2003) p.142-150, Watatsumiite, KNa2LiMn2V2Si8O24, a new mineral from the Tanohata mine, Iwate Prefecture, Japan, Locality: metamorphosed manganese ore deposit, Tanohata mine, Iwate Prefecture, Japan