| each mineral contains information on the formula, group, chemiclll the discovery; first the of history cplityand...this min ,eral is exact ly deter mi ned as the group of Pits prese ntly kno wn as P its nos. 75- 76 («pits...feldspar, micas. nepheline, magnetite, zircon, and pyrochlore in an alkaline pegmatite. It forms w�ll shaped...syenite pegmatite of the Tatarskii Massif, Tatarka River, Enisei �ange, Krasnoyarsk Territory, Siberia. The...in 1 956 in the core of a borehole in the Aksai Valley at the giant Chelkar salt dome, Uralsk district |
