Many Eastern Kentucky coals have high-REE contents, with lithotypes of the Pennsylvanian-age Manchester coal rivalling some of the richest concentrations in the Fire Clay coal, arguably the premier resource in terms of concentration and aerial extent.  A &gt;2000-ppm-REE (ash basis) Manchester coal lithotype, analyzed first by scanning electron microscopy, was selected for detailed transmission electron microscopy/ energy dispersive x-ray spectroscopy/ fast Fourier transform/ selected area electron diffraction investigation.  The grains, seemingly fragments of one or more 2-3-µm spherical nodules, proved to have a phosphate (florencite?) rim with a light REE (La through Sm) and Gd association. The core of the nodule and the region surrounding the nodule is Al-Si rich but the mineralogy could not be determined.  The nodule may have be a mineralized coprolite, the product of the microfauna inhabiting the peat.<br/>

Nano-scale mineralogy of a rare earth element-rich Manchester coal lithotype, Clay County, Kentucky

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

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