AM_Barytolamprophyllite_1
Formula: (Sr1.1 Ba.9) Na2.8 Mn.2 (Ti2.1 Fe.6) Mg.3 Si4 (O18 H2)
Name: Barytolamprophyllite
Unit cell: 19.744 7.099 5.409 90.0 96.77 90.0 , V=752.85
Space group: C12/M1 (12)

Rastsvetaeva R K , Dorfman M D , Crystallography Reports , 40 (1995) p.951-954, Crystal structure of Ba-lamprophyllite in the isomorphous lamprophyllite-, baritolamprophyllite series, Locality: Khibiny Massif