Kovacs, IstvanHermann, JoergO'Neill, HughFitz Gerald, JohnSambridge, MalcolmHorvath, Gabor2015-12-070003-004Xhttp://hdl.handle.net/1885/25252The predictions of the theory of light propagation in weakly absorbing anisotropic minerals are tested against systematic measurements of the infrared absorbance spectra of calcite, olivine, and topaz oriented in both principal and random sections, usingKeywords: absorbance; calcite; infrared spectroscopy; mineralogy; olivine; polarization; topaz Absorbance spectroscopy; Calcite; Infrared spectroscopy; Nominally anhydrous minerals; Olivine; Topaz; Unpolarized lightQuantitative absorbance spectroscopy with unpolarized light: Part II. Experimental evaluation and development of a protocol for quantitative analysis of mineral IR spectra200810.2138/am.2008.26562015-12-07