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In chemistry, a phosphate is an anion, salt, functional group or ester derived from a phosphoric acid. It most commonly means orthophosphate, a derivative of orthophosphoric acid, a.k.a. phosphoric acid H 3 PO 4. The phosphate or orthophosphate ion [PO 4] 3− is derived from phosphoric acid by the removal of three protons H +.
Phosphate is an inorganic anion of phosphoric acid OP(OH) 3. There are also organophosphorus compounds with the formula OP(OR) 3. ... Transition metal phosphate complex;
The general formula of a phosphoric acid is H n−2x+2 P n O 3n−x+1, where n is the number of phosphorus atoms and x is the number of fundamental cycles in the molecule's structure; that is, the minimum number of bonds that would have to be broken to eliminate all cycles.
Chemical formula. Fe 3 (PO 4) 2 Appearance brown powder Density: ... Iron(II) phosphate, also ferrous phosphate, [3] Fe 3 (PO 4) 2, is an iron salt of phosphoric acid.
Iron(III) phosphate, also ferric phosphate, [4] [5] is the inorganic compound with the formula Fe PO 4. Four polymorphs of anhydrous FePO 4 are known. Additionally two polymorphs of the dihydrate FePO 4 ·(H 2 O) 2 are known. These materials have attracted much interest as potential cathode materials in batteries.
Gold(III) phosphate is a chemical compound with the formula AuPO 4. It is a pale yellow solid that is insoluble in water and acetone . It decomposes at 450 °C into gold metal, phosphorus pentoxide , and oxygen .
With metal cations, phosphate forms a variety of salts. These solids are polymeric, featuring P-O-M linkages. When the metal cation has a charge of 2+ or 3+, the salts are generally insoluble, hence they exist as common minerals. Many phosphate salts are derived from hydrogen phosphate (HPO 4 2−). PCl 5 and PF 5 are common compounds.
Aluminium phosphate is a chemical compound. In nature it occurs as the mineral berlinite. [3] Many synthetic forms of aluminium phosphate are known. They have framework structures similar to zeolites and some are used as catalysts, ion-exchangers or molecular sieves. [4] Commercial aluminium phosphate gel is available.