Identifiction of a mid-infrared electronic absorption band of Fe2+ in the distorted M(2) site of orthopyroxene, (Mg,Fe)SiO3

Don S. Goldman and George R. Rossman
 Division of Geological and Planetary Sciences
California Institute of Technology
Pasadena, CA  91125

Abstract

An electronic absorption band of Fe2+ in the distorted, six-coordinate M(2) site of the common mineraf orthopyroxene, (Mg, Fe)SiO3, is rdentified at 2350 cm-1.  This band is attributed to the A1 - B2 transition within the split 5T2g state of Fe2+ in C2v symmetry.
     
     
 low energy band
                          
  The gamma spectrum of hypersthene (top) from Sumit Rock, Oregon, and bronzite (bottom) from Bamble, Norway.                 

last updated: 23-Jul-2023