title: [Combined analyses of mixed urinary stones by XPS and XRD].
abstract: In order to seek the methods for the prevention and cure of urinary stones in Dongjiang valley in Guangdong province, the chemical constituents and morphology of six mixed urinary stones were analyzed by X-ray photoelectron spectroscopy (XPS) and X-ray powder diffraction (XRD). All of the six stones consisted of calcium oxalate monohydrate (COM), calcium oxalate dihydrate (COD) and hydroxyapatite. Two of them contained little ammonium magnesium phosphate. As increasing the amount of phosphate in urinary stones, the amount of COM decreased and that of COD increased, which indicated that the sediment of phosphates in the stones can inhibit the transformation from high energy COD to low energy COM. Combining XPS and XRD methods, the compositions and phases of urinary stones can be obtained accurately.
authors.affiliation: Institute of Biomineralization and Lithiasis Research, Jinan University, Guangzhou 510632, China.
authors.forename: Jian-ming
authors.initials: JM
authors.lastname: Ouyang
mesh_terms: D002129:Calcium Oxalate / Q000032:analysis*; D006801:Humans; D006882:Hydroxyapatites / Q000032:analysis*; D017616:Magnesium Compounds / Q000032:analysis; D008297:Male; D010710:Phosphates / Q000032:analysis; D013052:Spectrometry, X-Ray Emission / Q000379:methods; D014545:Urinary Calculi / Q000737:chemistry*; D014961:X-Ray Diffraction / Q000379:methods
chemical_list: D006882:Hydroxyapatites; D017616:Magnesium Compounds; D010710:Phosphates; D002129:Calcium Oxalate