Imaging and image analysis of shale provides insights into the pore and fracture networks,
disposition of compositional elements, and signatures of diagenesis and fluid flow …

This paper provides a brief summary of the history, development and variety of applications
of electron microscopy techniques to analyze coals, organic-rich shales, and carbonaceous …

An alternative way for an estimation of coal rank, based on micro-Raman spectroscopy, is
presented. Raman spectra and mean random reflectance percentage (% R r) were …

The macromolecular evolution of coal in proximity to intrusion zones provides a means of
exploring the coal to coal-derived natural graphite (CDNG) transitions. Here, samples with …

Graphite samples from several mines (Austria, Brazil, China, Madagascar, Mozambique,
Norway, Russia, Sri Lanka and Ukraine) were investigated by reflectance measurements, X …

Metamorphism and deformation significantly affect the macromolecular structure of coal. In
this study, experiments were conducted using coal samples with different metamorphic …

The purpose of this study is to evaluate the effects of minerals, elemental composition and
macerals in anthracite on the microstructure and chemical composition of anthracite-based …

Raman spectroscopy is a nondestructive and in situ analytical technique that could provide
information on the chemical structure and structural ordering of carbonaceous materials …

Anthracite and coal-based graphite (CBG) samples were collected at varying distances from
a granite intrusion. Optical microscopy, X-ray diffraction, Raman spectroscopy, and high …

Thirteen raw coal samples from Qinshui coalfield were prepared to produce coal-based
graphene, and the raw coal, coal-based graphite, and coal-based graphene sheets (GS) …