title: [Are silicates only gravel stones?].
abstract: The presence of silicon dioxide in urinary calculi usually indicates the presence of artefacts. However in isolated cases infra-red and X-ray spectroscopy and electron-ray microanalysis have clearly demonstrated the presence of silicate in crystalline urinary sediment and as a phase of urinary calculi, probably as a result of overdoses of silicon preparations. A local silicon enrichment of up to 2% is certain in phosphate phases and makes an isomorphic incorporation of SiO4 ions probable.
mesh_terms: D006801:Humans; D007669:Kidney Calculi / Q000652:urine*; D008855:Microscopy, Electron, Scanning; D012822:Silicon Dioxide / Q000652:urine*; D014514:Ureteral Calculi / Q000652:urine*; D014961:X-Ray Diffraction
chemical_list: D012822:Silicon Dioxide
vernacular_title: Sind Silikate nur Kieselsteine?