Work

Kinetics of dissolution and growth of calcium fluoride and effects of phosphate

Year: 1988

Type: article

Abstract: The rate of growth of pure calcium fluoride crystals is controlled by a surface polynuclear mechanism when the supersaturation is less than 4.4. The surface free energy is found to be 120 mJ/m2. The dissolution process is also controlled by a surface process. Both of these processes are very strongly inhibited by phosphate ions. Calcium fluoride-like materials contaminated with phosphate are formed when calcium fluoride is precipitated in phosphate-containing solutions or suspensions. The physical and chemical properties of these materials have been investigated and compared with the corresponding properties of pure calcium fluoride. The former dissolve much faster than pure calcium fluoride in solutions containing phosphate, but an inhibitory effect is still shown. It is suggested that the calcium fluoride-like material formed on dental enamel during treatment of enamel with acidified solutions of high fluoride content is a phosphate-containing calcium fluoride.

Source: Acta Odontologica Scandinavica

DOI: 10.3109/00016358809004784

Authors: JØRgen Christoffersen, Margaret R. Christoffersen, Wiktor Kibalczyc, W. G. Perdok

Institutions: University of Copenhagen, University of Groningen, Lodz University of Technology

Language: English

Topic: Crystallization and Solubility Studies

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: diamond

OpenAlex ID: W2038776203

FWCI: 2.161

Cites: 15

Cited by: 105

Related to: 10