• Analysis of urinary stone constituents using powder X-ray diffraction and FT-IR

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    • Keywords


      Urinary stones; powder X-ray diffraction; calcium oxalate monohydrate; hydroxylapatite.

    • Abstract


      Constituents of urinary stones obtained from various patients from western part of India, which is a highly urinary stone disease-prone area, have been analysed. Eight stones from four patients were collected through urologists and have been analysed using powder X-ray diffraction and FT-IR. Thermogravimetric analysis (TGA) and scanning electron microscopic (SEM) image of selected samples were also carried out. The analysis revealed that calcium oxalate monohydrate, which is also known as whewellite, is the common constituent of all of the stones, particularly at the initial stage of stone formation. However, multi phases viz. whewellite phase, and hydroxyl and carbonate apatite phases are also detected in the case of third and fourth patients, from where multiple stones were obtained. Interestingly, in these mixed phase stones the concentration of whewellite decreases with increasing the concentration of apatite phases. Thermal behaviour of the whewellite phase was studied by TGA and variable temperature XRD analysis. Morphology of the whewellite and apatite phases, examined by SEM image, has also been reported.

    • Author Affiliations


      Pragnya A Bhatt1 Parimal Paul1

      1. Analytical Science Division, Central Salt and Marine Chemicals Research Institute, G B Marg, Bhavnagar 364 002
    • Dates

  • Journal of Chemical Sciences | News

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