Formation of Calcium Oxalates in the Human Body

  • Alina R. Izatulina
  • Yuriy O. Punin
Conference paper


Urolithiasis is rather widespread disease. However, till now there are no reliable methods of treatment and preventive maintenance for this illness, despite significant efforts. Moreover, it is completely not clear how renal stones are forming. The majority of renal stones consist of calcium oxalates – monohydrated whewellite CaC2O4·H2O and dihydrated weddellite CaC2O4·2H2O. Weddellite is a metastable phase under crystallizing conditions, and usually its crystals are substituted with small-grained whewellite. At the same time, about 38% of oxalate renal stones are made of weddellite. The purpose of this work is to examine the influence of crystallizing conditions on the calcium oxalates phase formation in the renal stones. Our modeling experiments were carried out with the variation of crystallizing conditions (temperature, pH, proportion of calcium and oxalate, organic and inorganic species in the physiological solution, amount of micromycetes and bacterial–viral associates, and time of crystallization). Experimental data show that the presence of peptides, bacteria, micromycetes and viruses, Mg2+, and CO3 2− ions in the solution stabilizes the calcium oxalate dehydrate crystallization.


Medical mineralogy Renal stones Calcium oxalate Biocrystallization 


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This work was supported by Russian Foundation for Basic Research (grant # 10-05-00881-a).


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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Department of GeologySt.-Petersburg State UniversitySt PetersburgRussia

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