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Thermodynamics of Hydroxyapatite Surfaces

Walter E. Brown ; American Dental Association Health Foundation Research Unit, National Bureau of Standards, Washington, DC 20234, USA
Lawrence C. Chow ; American Dental Association Health Foundation Research Unit, National Bureau of Standards, Washington, DC 20234, USA
M. Mathew ; American Dental Association Health Foundation Research Unit, National Bureau of Standards, Washington, DC 20234, USA

Puni tekst: engleski, pdf (11 MB) str. 779-787 preuzimanja: 70* citiraj
APA 6th Edition
Brown, W.E., Chow, L.C. i Mathew, M. (1983). Thermodynamics of Hydroxyapatite Surfaces. Croatica Chemica Acta, 56 (4), 779-787. Preuzeto s https://hrcak.srce.hr/194197
MLA 8th Edition
Brown, Walter E., et al. "Thermodynamics of Hydroxyapatite Surfaces." Croatica Chemica Acta, vol. 56, br. 4, 1983, str. 779-787. https://hrcak.srce.hr/194197. Citirano 07.03.2021.
Chicago 17th Edition
Brown, Walter E., Lawrence C. Chow i M. Mathew. "Thermodynamics of Hydroxyapatite Surfaces." Croatica Chemica Acta 56, br. 4 (1983): 779-787. https://hrcak.srce.hr/194197
Harvard
Brown, W.E., Chow, L.C., i Mathew, M. (1983). 'Thermodynamics of Hydroxyapatite Surfaces', Croatica Chemica Acta, 56(4), str. 779-787. Preuzeto s: https://hrcak.srce.hr/194197 (Datum pristupa: 07.03.2021.)
Vancouver
Brown WE, Chow LC, Mathew M. Thermodynamics of Hydroxyapatite Surfaces. Croatica Chemica Acta [Internet]. 1983 [pristupljeno 07.03.2021.];56(4):779-787. Dostupno na: https://hrcak.srce.hr/194197
IEEE
W.E. Brown, L.C. Chow i M. Mathew, "Thermodynamics of Hydroxyapatite Surfaces", Croatica Chemica Acta, vol.56, br. 4, str. 779-787, 1983. [Online]. Dostupno na: https://hrcak.srce.hr/194197. [Citirano: 07.03.2021.]

Sažetak
A new model for equilibria at the interface of a sparingly
soluble crystal is reviewed. It provides that several kinds of equilibria
are present and each type is characterized by (i) a set of
species that are transported across the phase boundary, (ii) a set ·
of chemical reactions which describe this transport process, and
(iii) a set of thermodynamic expressions which define equilibrium.
Three types are envisaged: 1. Stoichiometric equilibrium provides
the thermodynamic communication between the lattice and the
bulk solution, occurs at a kink site, preserves the composition of
the solid phase, defines a solubility product, leads to an isotherm
in the phase diagram, and is unaffected by Galvani potentials. The
equilibrium is defined by a single equation. 2. Gibbsian equilibrium
in which the chemical potential of each component is stated to be
equal across the phase boundary, but does not define an actual
chemical process. There is one such equation for each component
in the system. 3. Electrochemical equilibrium provides thermodynamic
communication between ions in the bulk phase and those
in the outer layer of the crystal, is nonstoichiometric, is profoundly
affected by Galvani potentials, does not lead to a solubility product
constant nor to an isotherm, and requires one more equilibrium
condition than there are components in the system. Equilibrium
between the lattice and the surface is limited to reactions via the
aqueous phase, one of which is stoichiometric and the other nonstoichiometric.
This model provides a clarity of description of
interfacial events heretofore unattainable.

Hrčak ID: 194197

URI
https://hrcak.srce.hr/194197

Posjeta: 128 *