Summary
The chemical composition of the different mineral phases in the nuclei and peripheral coatings of 200 urinary calculi was investigated by X-ray diffraction. The nuclei were found to contain 7 different substances. There was no relationship between the mineral composition of the nucleus and periphery. Scanning electron microscopy showed the absence of an organized aggregate structure in the mineral crytals in the nucleus. Since every mineral phase in the urolith can act as potential nucleus for new stone formation, this property must be taken into account in the prophylaxis or recurrent nephrolithiasis.
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Bastian, H.P., Gebhardt, M. The varying composition of the nucleus and peripheral layers of urinary calculi. Urol. Res. 2, 91–95 (1974). https://doi.org/10.1007/BF00554593
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DOI: https://doi.org/10.1007/BF00554593