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  1. No Access

    Article

    A combined temperature dependent57Fe Mössbauer and single crystal X-ray diffraction study of synthetic almandine: evidence for the Gol'danskii-Karyagin effect

    Synthetic almandine garnet, Fe3Al2Si3O12, has been studied by temperature — dependent single crystal X-ray diffraction and57Fe Mössbauer spectroscopy. The Fe2+ doublet in almandine is characterized by a small asy...

    C. A. Geiger, Th. Armbruster, G. A. Lager, K. Jiang… in Physics and Chemistry of Minerals (1992)

  2. No Access

    Article

    Prediction of refractive indices in minerals from crystallographic data: Applications and limitations of the point-dipole model

    A point-dipole calculation which incorporates an expression for the Lorentz-factor tensor has been used to model the effect of chemical substitution on refractive index and optic axial angle (2V). Isotropic elect...

    G. A. Lager, Th. Armbruster, D. Pohl in Physics and Chemistry of Minerals (1987)