This paper demonstrates a new method to classify mineral phases in 3D images of particulate materials obtained by X-ray computed micro-tomography (CT), here named mounted single particle characterization for mineralogical analysis (MSPaCMAn). The allows minimizing the impact imaging artefacts that make classification voxels inaccurate and thus hinder use CT characterize natural materials. MSPaC...

Different ancient mortar samples of Pamplona’s San Cernin church have been analyzed to characterize their binder and aggregate fractions. A complete characterization has been carried out including chemical (rapid approximate analysis, soluble salts and trace elements, using traditional chemical procedures, ionic chromatography and spectrophotometry techniques), mineralogical-petrographic (struc...

Agricultural soils of selected regions of Southwestern Karnataka, Peninsular India, were subjected to systematic mineralogical characterization along with the study of soil physical properties. Physical properties such as soil texture and micro porosity were studied using particle size analyses and positron annihilation lifetime analysis (PALS) technique, respectively. The latter was used to an...

Tile crystal structures of sjogrenite and pyroaurite, two stacking modifications of approximate composition Mg.Fe.(OH),.(CO.).4H.O, have been determined by X-ray diffraction using three-dimensional methods. Sjogrenite is hexagonal, with a 3,13, C 15.66 A, space group P6.!mmc, Z = !; pyroaurite is rhombohedral, with aH 3,13, CH 23.49 A, space group R3m or R3m, Z = i. Both structures are based on...

This paper presents a mineralogical and chemical investigation of shale deposits from the U.S. Gulf coast in order to document the mechanisms and reactions involved in the diagenetic conversion of smectite into illite. Cuttings from the 1,250 to 5,500 m stratigraphic interval of a well were sorted by grain size and analzyed by x-ray diffraction to assess chemical and mineralogical trends with d...

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of the International Mineralogical Association, 16th general meeting (1994), p. 40. 17. W. P. Grif® th, `̀ Raman Spectroscopy of Minerals’ ’ , in The Infrared Spectra of Minerals, V. C. Farmer, Ed. (Mineralogical Society, Lon-

Parametric waveform, monoand multiscale analyses methods are used to characterize the properties of the 410 discontinuity. The characterization involves the estimation of the sharpness, smoothness and extent of this transition from Pds converted phases. In our approach sharpness is no longer associated with the extent of the first-order discontinuity. Instead, the sharpness is related to the fr...