Microworking and mineral-geochemical properties of typical human concrements

The results of complex mineralogical-geochemical and isotope-geochemical studies of a collection of concrements typical for the Rostov-on-Don region are presented. The anatomical structure, microstructure, thermal properties, chemical and phase composition, assortment and content of microelements are analyzed. According to the data of X-ray diffraction analysis and normative-mineral calculation, uricite, sodium urate, hydroxylcarbonatapatite, oxalates, and sulfates of Fe, K, Ca are found in the calculi. For the first time, an organic substance was isolated from urinary and kidney stones and the isotopic composition of carbon and nitrogen were determined in it. The genetic issues of calculus formation are discussed taking into account the data on the chemical and microelement composition of drinking water.