Accession Number : AD0812829

Title :   THE CRYSTAL STRUCTURES OF SPODIOSITE ANALOGS AND THEIR SPECTRAL PROPERTIES.

Descriptive Note : Doctoral thesis,

Corporate Author : POLYTECHNIC INST OF BROOKLYN NY

Personal Author(s) : Greenblatt, Martha

Report Date : JUN 1967

Pagination or Media Count : 83

Abstract : Recently the syntheses of compounds of composition Ca2CrO4Cl and Ca2PO4Cl, as well as their strontium analogs have been reported. X-ray diffractometric studies indicated that the dimensions of the unit cells of these phases were close to those of the chlorospodiosite (ideally Ca2PO4Cl). The Ca2CrO4Cl compound is of particular interest, since in it the chromium appears to be in the +5 state. The analysis of the crystal structures of Ca2CrO4Cl and Ca2PO4Cl was undertaken to make possible detailed comparisons of the atomic parameters in the two structures, to establish whether the chromium was indeed present in the +5 state in the chromate compound, and to permit the comparisons of the results of the X-ray analyses with corresponding results of optical measurements and electron spin resonance measurement on these compounds. (Author)

Descriptors :   (*CALCIUM COMPOUNDS, CRYSTAL STRUCTURE), PHOSPHATES, FLUORIDES, CHROMATES, CHLORIDES, INFRARED SPECTRA, MEASUREMENT, ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, ELECTRON PARAMAGNETIC RESONANCE, THEORY, HYPERFINE STRUCTURE, CRYSTAL LATTICES, SINGLE CRYSTALS.

Subject Categories : Inorganic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE