title: Study on calcium oxalate monohydrate renal uroliths. III. Composition and density.
abstract: Density and content of mineral constituents were determined for 33 human calcium oxalate monohydrate (hereafter COM) uroliths whose external appearance and inner structure were described in part I and II respectively. Studied stones contained 0.13-0.42 wt.% of struvite, 0.68-4.12 wt.% of hydroxyapatite, 73-96 wt.% of COM and 3-10 wt.% of water unbound in a crystallohydrate 10 to 20 wt.% of calculus mass is not accounted for by chemical analysis. Density of COM calculi varying between 1.67 and 2.06 g cm-3 is not a function of any single stone parameter. Around 30% of stone volume is not occupied by crystalline components. The mulberry stones of sedimentary origin contained higher amount of organic matter than papillar and mulberry stones displaying site of attachment to epithelium.
authors.affiliation: Department of Chemistry, University Illes Balears, Palma de Mallorca, Spain.
authors.forename: O
authors.initials: O
authors.lastname: Söhnel
authors.forename: F
authors.initials: F
authors.lastname: Grases
authors.forename: L
authors.initials: L
authors.lastname: García-Ferragut
authors.forename: J G
authors.initials: JG
authors.lastname: March
mesh_terms: D002129:Calcium Oxalate / Q000032:analysis*; D003720:Densitometry; D017886:Durapatite / Q000032:analysis; D006801:Humans; D007669:Kidney Calculi / Q000737:chemistry* / Q000145:classification; D017616:Magnesium Compounds / Q000032:analysis; D008903:Minerals / Q000032:analysis; D010710:Phosphates / Q000032:analysis; D000069877:Struvite
chemical_list: D017616:Magnesium Compounds; D008903:Minerals; D010710:Phosphates; D002129:Calcium Oxalate; D017886:Durapatite; D000069877:Struvite