Spectroscopic
Standard for
Tetrahedrally Coordinated Ferric Iron:
gamma LiAlO2:Fe3+
Glenn A. Waychunas
Center for Materials Reseaerch
Stanford University
Stanford, CA 94305, USA
George R. Rossman
Division of Geological and Planetary Sciences
California Institute of Technology
Pasadena, CA 91125, USA
Abstract.
γ LiAlO2 doped with Fe3+
in the tetrahedral site has been examined by extended X-ray absorption
fine structure (EXAFS) analysis, and Mössbauer and optical
spectroscopy. The isomer shift (IS) is -0.026 mm/s (Fe-Pd); the
quadrupole splitting (QS) is 0.62 mm/s. Anisotropic optical absorption
is prominent at~.391, 452, and 463 nm. The K-edge absorption spectrum
shows a prominent absorption near 7.113 ev typical of tetrahedrally
coordinated Fe3+.
Optical spectrum of lithium aluminate with tetrahedral ferric iron
last updated 3-Sep-2017