A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Stoichiometric Composition of Whitlockite
The mineral whitlockite has been described as having Ca/P ratios of 3:2 and 10:7. This study used the pyrolytic formation of pyro-phosphate and whitlockite from calcium orthophosphates and their mixtures with CaCO3 to determine this Ca/P ratio. Its mean value of 1.506 plus or minus 0.015 indicated a formula of Ca3(PO4)2. It is well known from X-ray studies that the mineral whitlockite is identical with the salt known as beta-tricalcium phosphate, beta-Ca3(PO4)2. It is a material of biologic significance as a constituent of dental calculus, carious regions of the teeth, and urinary tract concretions. However, arguments have been presented for a molar calcium-to-phosphorus ratio of 10:7 and have raised doubts regarding the exact stoichiometry of whitlockite. These doubts have limited the development of chemical models for those biochemical processes in which whitlockite is a product or reactant.
Stoichiometric Composition of Whitlockite
The mineral whitlockite has been described as having Ca/P ratios of 3:2 and 10:7. This study used the pyrolytic formation of pyro-phosphate and whitlockite from calcium orthophosphates and their mixtures with CaCO3 to determine this Ca/P ratio. Its mean value of 1.506 plus or minus 0.015 indicated a formula of Ca3(PO4)2. It is well known from X-ray studies that the mineral whitlockite is identical with the salt known as beta-tricalcium phosphate, beta-Ca3(PO4)2. It is a material of biologic significance as a constituent of dental calculus, carious regions of the teeth, and urinary tract concretions. However, arguments have been presented for a molar calcium-to-phosphorus ratio of 10:7 and have raised doubts regarding the exact stoichiometry of whitlockite. These doubts have limited the development of chemical models for those biochemical processes in which whitlockite is a product or reactant.
Stoichiometric Composition of Whitlockite
B. M. Wallace (author) / W. E. Brown (author)
1971
5 pages
Report
No indication
English
A Whitlockite-Like Calcium Copper Phosphate
| British Library Online Contents | 1994
Preparation of Plasma Sprayable -Whitlockite Powder
| British Library Online Contents | 1997
Triple Phosphates of Calcium, Sodium and Trivalent Elements with Whitlockite-Like Structure
| British Library Online Contents | 1996
Site occupancy and luminescence of Ce3+ ions in whitlockite-related strontium lutetium phosphate
| British Library Online Contents | 2019
| British Library Online Contents | 2018