title: Composition of apatites in human urinary calculi.
abstract: Calcium-deficient carbonate apatites in urinary calculi from 17 patients have been studied. Magnesium ions in each case were detected as a component of apatite. In most of the cases, CO23- ions were included in the apatitic lattice. Using a calcination procedure, we have determined the most probable average value for the CO23- content, degree of deficiency, x, and the Mg/Ca ratio in each sample.
mesh_terms: D001031:Apatites / Q000032:analysis*; D002118:Calcium / Q000032:analysis; D002254:Carbonates / Q000032:analysis; D055598:Chemical Phenomena; D002621:Chemistry; D006801:Humans; D006878:Hydroxides / Q000032:analysis; D007669:Kidney Calculi / Q000378:metabolism; D008274:Magnesium / Q000032:analysis; D010710:Phosphates / Q000032:analysis; D013054:Spectrophotometry, Atomic; D014545:Urinary Calculi / Q000378:metabolism*
chemical_list: D001031:Apatites; D002254:Carbonates; D006878:Hydroxides; D010710:Phosphates; D008274:Magnesium; D002118:Calcium