Synthesis and characterization of monomagnesium phosphate tetrahydrate

R. Dudenhoefer, Gary Lynn Messing, P. W. Brown, G. G. Johnson

Research output: Contribution to journalArticle

Abstract

Monomagnesium phosphate tetrahydrate (MMPT) has been synthesized and characterized by X-ray diffraction and thermal analyses techniques. MMPT is incongruently soluble and solids in equilibrium with a solution having an MG:P ratio of 1:2 coexist at an invariant point involving MMPT and MgHPO4·3H2O. MMPT exists in a P-tetragonal unit cell with room temperature lattice parameters: a = 13.712 Å and c = 21.984 Å. When MMPT is heated at atmospheric pressure MMPT initially transforms to the dihydrate. At higher temperature further transformations result in the simultaneous formation of the anhydrous phase and the pyrophosphate: MgH2P2O7. With further dehydration, Mg(PO3)2 is formed.

Original languageEnglish (US)
Pages (from-to)121-126
Number of pages6
JournalJournal of Crystal Growth
Volume125
Issue number1-2
DOIs
StatePublished - Nov 2 1992

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phosphates
Phosphates
synthesis
Dehydration
dehydration
Atmospheric pressure
Lattice constants
lattice parameters
atmospheric pressure
X ray diffraction
Temperature
room temperature
cells
diffraction
x rays

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Dudenhoefer, R. ; Messing, Gary Lynn ; Brown, P. W. ; Johnson, G. G. / Synthesis and characterization of monomagnesium phosphate tetrahydrate. In: Journal of Crystal Growth. 1992 ; Vol. 125, No. 1-2. pp. 121-126.
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Synthesis and characterization of monomagnesium phosphate tetrahydrate. / Dudenhoefer, R.; Messing, Gary Lynn; Brown, P. W.; Johnson, G. G.

In: Journal of Crystal Growth, Vol. 125, No. 1-2, 02.11.1992, p. 121-126.

Research output: Contribution to journalArticle

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AB - Monomagnesium phosphate tetrahydrate (MMPT) has been synthesized and characterized by X-ray diffraction and thermal analyses techniques. MMPT is incongruently soluble and solids in equilibrium with a solution having an MG:P ratio of 1:2 coexist at an invariant point involving MMPT and MgHPO4·3H2O. MMPT exists in a P-tetragonal unit cell with room temperature lattice parameters: a = 13.712 Å and c = 21.984 Å. When MMPT is heated at atmospheric pressure MMPT initially transforms to the dihydrate. At higher temperature further transformations result in the simultaneous formation of the anhydrous phase and the pyrophosphate: MgH2P2O7. With further dehydration, Mg(PO3)2 is formed.

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