Topic
Ankerite
About: Ankerite is a research topic. Over the lifetime, 859 publications have been published within this topic receiving 23960 citations.
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01 Jan 2005
TL;DR: In this article, the real possibilities of FTIR-spectroscopy application along with thermal analysis (TG/DTA) for examining clay minerals in rocks are presented, where the individual clay minerals often occur in a form of mixed-layer clay minerals with various ratios of individual components, IR spectra and DTA curves of mixtures (either natural or synthetic) were recorded, too.
Abstract: Real possibilities of FTIR-spectroscopy application along with thermal analysis (TG/DTA) for examining clay minerals in rocks are presented. These methods were used for determination of mineral composition in sedimentary rock samples from the shaft No.4 Frenstat -West, Northern Moravia, CZ. Previously, the samples representing the basic clay mineral specimen were investigated by means of the following methods. In order to provide an adequate characterization of these samples, X-ray diffraction and X-ray fluorescence spectroscopy were utilized. As the individual clay minerals often occur in a form of mixed-layer clay minerals with various ratios of individual components, IR spectra and TG/DTA curves of mixtures (either natural or synthetic) were recorded, too. Clay minerals represented mainly by fine-crystalline illite (muscovite) with traces of kaolinite were predominant. Besides, carbonates (calcite, ankerite) and silica minerals occured in these samples, too. A presence of pyrites and coal matter was confirmed only by thermal analysis. Traces of feldspars were detected by means of FTIR spectroscopy in some rock samples.
105 citations
TL;DR: Mossbauer spectroscopy has been used to analyse the included minerals and mineral-derived phases of a large suite of coal, coke, and other coal-related samples as mentioned in this paper.
102 citations
TL;DR: The petrology, mineralogy, and inorganic geochemistry of two contrasting high-sulfur, vitrinite-rich subbituminous to bituminous coals from the North Eastern Region (NER) of India have been studied using a combination of optical microscopy, quantitative X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscope (HR-TEM/SAED), and chemical analysis techniques as discussed by the authors.
99 citations
93 citations
TL;DR: In this article, coal seams from the Parana Basin in southern Brazil have been characterized using a combination of chemical and geochemical analysis, and the results were broadly consistent with the bulk chemical and mineralogical analysis.
91 citations