We studied partially altered veined nepheline syenites at the Chernihivka carbonatite massif of Azov region, Ukraine. The major minerals syenite are albite, nepheline, biotite and calcite. Fluorapatite, allanite-(Ce), monazite-(Ce), barite stronalsite occur as minor accessory phases. primary minerals, containing REE in rocks, reflect re-equilibration a mineral/fluid systems recrystallization ro...

The purpose of this study was to evaluate quantitatively the effects of fluoride on the solubility and crystallinity of carbonated apatites (CAPs) after its incorporation into the crystal lattice using the metastable equilibrium solubility (MES) distribution method. Fluoride-incorporated CAPs (F-CAPs) of two different carbonate levels (3 and 5%) and fluoride contents from 0 to 20,000 µg/g were ...