Accession Number : AD0697710

Title :   APPLICATION OF INFRARED SPECTROSCOPY TO THE STUDY OF THE PROCESS OF THERMAL DEHYDRATION OF MONOSUBSTITUTED PHOSPHATES OF MAGNESIUM AND CALCIUM,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Pechkovskii,V. V. ; Shchegrov,L. N. ; Melnikova,R. Ya. ; Shulman,A. S. ; Gusev,S. S.

Report Date : 05 SEP 1969

Pagination or Media Count : 7

Abstract : By the IR spectrum method it was established that the final product of thermal dehydration of Mg(H2PO4)2.2H2O is the cyclic tetrametaphosphate of magnesium. Acid ortho- and pyrophosphates of magnesium appear as intermediate condensation products. A diagram of the process of dehydration of Mg(H2PO4)2.2H2O is given. Thermal dehydration of Ca(H2PO4)2.H2O leads to the formation at 450-500 of an amorphous metaphosphate of calcium of the type Metal (II) (PO3)2)n, passing to the crystalline state at 600C. The formation of complex mixtures of calcium polyphosphates is characteristic for temperatures below 400C. (Author)

Descriptors :   (*PHOSPHATES, *DEHYDRATION), (*INFRARED SPECTRA, PHOSPHATES), CALCIUM COMPOUNDS, MAGNESIUM COMPOUNDS, DIFFERENTIAL THERMAL ANALYSIS, USSR

Subject Categories : Inorganic Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE