Stabilization of the amorphous state of calcium carbonate-phosphates with phosphate ions
https://doi.org/10.29235/1561-8323-2022-66-5-501-508
Abstract
Amorphous calcium carbonate-phosphate with a Ca/P ratio of 1.83 was precipitated from Ca2+, Ca2+, PO3–4, CO2-3 − containing solutions at pH 10 and stabilized by ethanol dehydration and followed by heating at 400 °C. The presence of PO3–4 ions in the structure of amorphous calcium carbonate-phosphate provides its increased resistance to transformation into crystalline phases. Aging in a Ca2+, PO3–4 , CO2-3 − containing mother solution at pH 10 for 4 days promotes the transformation of amorphous calcium carbonate-phosphate into amorphous calcium carbonate-phosphate / carbonated hydroxyapatite / calcite. The combined effect of PO3–4 и CO2-3 − ions in the aquatic environment on the crystallization of amorphous calcium carbonate-phosphate into carbonated hydroxyapatite contributes to a maximum stabilization of the amorphous state that provides a high extent of bioactivity.
About the Authors
I. E. Glazov
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Glazov Ilya E. – Junior Researcher
9/1, Surganov Str., 220072, Minsk
V. K. Krut’ko
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Krut’ko Valentina K. – Ph. D. (Chemistry), Associate
Professor, Head of the Laboratory
9/1, Surganov Str., 220072, Minsk
O. N. Musskaya
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Musskaya Olga N. – Ph. D. (Chemistry), Associate Professor, Leading Researcher
9/1, Surganov Str., 220072, Minsk
A. I. Kulak
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Kulak Anatoly I. – Academician, D. Sc. (Chemistry), Professor, Director
9/1, Surganov Str., 220072, Minsk
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