| 释义 |
calcium phosphate
noun
1. : an orthophosphate of calcium: as
a. : one of the three simple orthophosphates, white or colorless when pure, usually prepared by reaction of phosphoric acid or phosphorus pentoxide with lime, hydrated lime, or limestone:
(1) : the primary phosphate CaH4(PO4)2 or its monohydrate CaH4(PO4)2.H2O used in the form of superphosphate as a fertilizer and in pure form as an acid ingredient in baking powder, prepared flours, and bakery products — called also calcium dihydrogen phosphate, monobasic calcium phosphate, monocalcium phosphate
(2) : the secondary phosphate CaHPO4 or its dihydrate CaHPO4.2H2O found in nature as monetite or brushite respectively and used as a mineral supplement in pharmaceutical preparations and animal feeds and as a polishing agent in tooth powders and pastes — called also calcium hydrogen phosphate, dibasic calcium phosphate, dicalcium phosphate
(3) : the tertiary phosphate Ca3(PO4)2 found in nature as whitlockite and made by fusion of phosphorus pentoxide and lime or by fusion and defluorination of phosphate rock or phosphate sand for use as a fertilizer — called also tribasic calcium phosphate, tricalcium phosphate
b.
(1) : a naturally occurring apatite
(2) : an industrial product consisting essentially of hydroxylapatite usually prepared by adding phosphoric acid to a lime slurry and used chiefly in ceramics, in making enamels and milk glass, as a noncaking agent especially in salt and sugar, and as a source of calcium and phosphorus in pharmaceutical preparations — called also tertiary calcium phosphate, tribasic calcium phosphate, tricalcium phosphate
2. : a phosphate of calcium (as calcium metaphosphate, calcium pyrophosphate) other than an orthophosphate |