Stephen Arthur Langford
Keywords: Refractive indices, whole-rock and mineral powders, emmons double-variation liquid-immersion refractometry, statistically significant data sets, 3D modeling, specific refractivity K p , notation, Mandarino compatibility indices (MCI)
Abstract: A specific-refractivity (K p ) model for a whole-rock powder is represented. Successful, innovative completion of this reconnaissance to explore whether compatibility indices might be calculable even for whole-rock samples (not just for mineral separates) suggests that using only statistically-significant data sets when estimating specific refractivities would significantly improve precisions and accuracies of results. K p and E% (percentages of fragments with RIs matching those of immersion liquids) profiles are drawn and interpreted. Automation of all related technologies and widespread cooperative work on the same standard samples are suggested, in order both to facilitate inter-laboratory instrument calibrations and to improve discrimination among samples
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