Accession Number : AD0609185

Title :   PARAMAGNETIC RESONANCE ABSORPTION SPECTRA OF DIVALENT MANGANESE AND TRIVALENT IRON IN CALCITE.

Descriptive Note : Final rept.,

Corporate Author : ROME AIR DEVELOPMENT CENTER GRIFFISS AFB N Y

Personal Author(s) : Constantine,James G.

Report Date : JUL 1964

Pagination or Media Count : 89

Abstract : The electron paramagnetic resonance absorption spectra of divalent manganese and trivalent iron in single crystals of natural calcite were observed at x-band frequencies. Careful relative intensity measurements of the doublet structure of these spectra, resulting from the difference in the crystal-line electric fields at the two calcium Ca(++) substitutional sites occupied by manganese Mn(++) and iron Fe(+++) ions, were made. These measurements showed that manganese does not preferentially occupy either of the two magnetically nonequivalent sites, while iron shows preferential occupation of one site. In both cases, samples of approximately the same ion concentration were used.

Descriptors :   (*CALCITE, PARAMAGNETIC RESONANCE), (*MANGANESE, ABSORPTION SPECTRA), (*IRON, ABSORPTION SPECTRA), SINGLE CRYSTALS, CRYSTAL STRUCTURE, CRYSTAL LATTICES, CALCIUM COMPOUNDS, CARBONATES, ELECTROMAGNETIC FIELDS, MATHEMATICAL ANALYSIS, IMPURITIES, X BAND

Distribution Statement : APPROVED FOR PUBLIC RELEASE