Total chemical analysis of luminescent apatite together with quantitative x-ray diffraction analysis for secondary phases have made it possible to delineate the maximum permissible nonstoichiometry. Based on the accuracy of the various methods and expressed as a deficiency of calcium, the extent of nonstoichiometry is less than the absence of one calcium in every 380 calcium sites. Quantitative experimental evidence is also presented to support the hypothesis for charge compensation of antimony by a corresponding oxygen substitution at halogen sites.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.