Trimagnesium phosphate
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Trimagnesium phosphate describes inorganic compounds with formula Mg3(PO4)2·nH2O. They are magnesium acid salts of phosphoric acid, with varying amounts of water of crystallization: n = 0, 5, 8, 22.[1]
The octahydrate forms upon reaction of stoichiometric quantities of monomagnesium phosphate (tetrahydrate) with magnesium hydroxide.
The octahydrate is found in nature as the mineral bobierrite.[2]
The anhydrous compound is obtained by heating the hydrates to 400 °C. It is isostructural with cobalt(II) phosphate. The metal ions occupy both octahedral (six-coordinate) and pentacoordinate sites in a 1:2 ratio.[3]
Safety
Magnesium phosphate tribasic is listed on the FDA's generally recognized as safe, or GRAS, list of substances.[4]
See also
References
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