Abstract:

Powder X-ray diffraction was used to study and classify the composition of renal calculi collected from 82 donors in Vitória City, Brazil, since 2002. It was found that 31.7% of the samples were composed entirely of calcium oxalate monohydrate. One representative sample was studied using powder X-ray diffraction with synchrotron radiation. Rietveld refinement of the monophasic Ca(CO2)2.H2O X-ray diffraction pattern indicated that the calcium oxalate monohydrate found in renal calculi presents a different fractional atomic coordinates than ICCD CIF 30782, which was used as the input data in the refinement. In conclusion, as considering Ca(CO2)2.H2O found in kidney stones, we report an improvement on description of structural parameters.