The cyclic anion comprising three tetrahedral groups linked by three P–O–P bridges. Each phosphorus has two terminal oxygen atoms. It can bind a metal through one terminal oxygen from each phosphorus.
A family of calcium-containing phosphate compounds. precipitation of such minerals can replicate soft tissues during phosphatization.
Inorganic phosphate, abbreviated , denotes the free phosphate pool in biochemical chemical equations, including ATP hydrolysis. Its constituent chemical species depend on pH and protonation; does not specify a single electric charge or proton count. See the IUBMB recommendations on biochemical reactant pools.