Flotation mechanisms of calcareous phosphates ores, and in particular the reaction between phosphoric acid fluorapatite have still to be elucidated. In present work, variations carbonated hydroxyfluorapatite (C-HFAp) contact with various concentrations were studied using ex-situ in-situ techniques, namely Raman Infrared spectroscopy, X-Ray diffraction (XRD) Scanning Electron microscopy (SEM). s...

Abstract The major issue studied in this paper is a natural mineral aggregate of quartz, calcite, and fluorapatite (the raw material originated from Bulgaria) before after high energy milling thermal treatment, the order to investigate properties CaO-SiO2-P2O5 ceramic system. activation effects are monitored by chemical analysis, X-ray powder diffraction, Fourier transformed infrared spectrosco...

A lthough recent data suggest that the incidence rate of dental caries has begun to decline dramatically in developed nations' Canadians still have a moderate to high rate of the disease.2 Fluoridation of communal water supplies is the most cost-effective measure to prevent dental caries; it reduces dental decay by 30% to 60% yet costs only about 15¢ per person per year.3 Unfortunately, only ab...

Apatite (Ap) dissolution in diluted acids is well described the literature, but technological processes which use more concentrated acids, reaction fast, and it complicated to follow process kinetics. The relationship between pH change apatite rate depending on HCl concentration was studied by thermodynamic calculations experiments with synthetic fluorapatite (FAp). On basis of experimental mea...

Introduction: The volatile component of apatite [Ca5(PO4)3(F,Cl,OH)] makes it a popular choice for studying the abundance and distribution of indigenous lunar volatiles [e.g. 1-5]. The thermodynamic behavior of volatile partitioning into apatite is, however, poorly constrained. Limited experimental studies of apatite/melt partitioning have focused on terrestrial systems [6], chlorine-brine syst...

Phosphorus (P) usually occurs as microcrystalline minerals of carbonate fluorapatite (CFA) in sediments upwelling-related areas. The Upper Cretaceous/Paleogene marine sedimentary rocks Morocco host the world's largest economic reserves phosphorus, which were deposited on eastern passive margin central Atlantic Ocean. However, a full petrographic, mineralogical and geochemical characterization M...