04

NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2013, 4 (1), P. 48–53

Ca3(PO4)2 POLYMORPHISM

P.V. Evdokimov – Department of Materials Science, M.V. Lomonosov Moscow State University, Moscow, Russia
V. I. Putlyaev – Department of Materials Science, Chemistry department, M.V. Lomonosov Moscow State University, Moscow, Russia
D.A. Merzlov – Chemistry department, M.V. Lomonosov Moscow State University, Moscow, Russia
T.B. Shatalova – Chemistry department, M.V. Lomonosov Moscow State University, Moscow, Russia
T.V. Safronova – Department of Materials Science, Chemistry department, M.V. Lomonosov Moscow State University, Moscow, Russia
E.S. Klimashina – Department of Materials Science, Chemistry department, M.V. Lomonosov Moscow State University, Moscow, Russia
B.R. Churagulov – Chemistry department, M.V. Lomonosov Moscow State University, Moscow, Russia

The present article is devoted to the β → α phase transformation of Са3(РО4). This phase transformation is low-rate, first-order reconstructive transition, so α−Са3(РО4)2 can be obtained in the course of low-rate cooling (ca. 5˚С/min). Transformation α → α’ is a high-rate, first-order deformation phase transition; such a fact indicates that α’−Ca3(PO4)2 cannot be obtained even by quenching.

Keywords: tricalcium phosphate, polymorphism, reconstructive phase transition, deformation phase transition, first-order transition.

UDC 546.41:546.185:617:666.3:666.1:666.9

PACS 87.85.J

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