Abstract
Among the promising raw materials are products from the dressing of apatite-nepheline ore from the Partamchorr (Kolar Peninsula) deposit [i, 2], which have a complex composition. Besides apatite and nepheline they contain about 20 different minerals. The chemical composition of some apatite-nephel%ne ore dressing products* are given in Table i. All of these materils, produced on a commercial scale, have constant chemical and mineralogical compositions.
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