
doi: 10.1007/bf03046711
Apatite occurs in the apatite-magnetite pegmatites associated with pyroxene gneisses, hypersthene granites and garnet-sillimanite gneisses of Kasipatnam. The refractive indices, the unit cell dimensions and the infrared absorption spectra of apatite show that it is essentially carbonate-fluor apatite. The mineralogical and geochemical features suggest that the apatite-magnetite deposits are igneous in origin, most probably having a carbonatitic affinity.
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