Raman studies on rock-forming minerals. Part I. Orthosilicates and cyclosilicates

Abstract

The Raman spectra of a number of orthosilicates of the garnet, zircon, olivine, phenacite, and other groups have been measured and modes due to the internal vibrations of (SiO₄) groups assigned; a number of isostructural compounds were also studied. Spectra were also measured of minerals containing (Si₃O₉), (Si₄O₁₂), and (Si₆O₁₈) rings (benitoite, catapleite, axinite, dioptase, beryl, and tourmaline) and group assignments for these and other cyclosilicates suggested, the spectra of model ring compounds of germanates and phosphates being used as a basis.