Minerals in coal: a transmission electron microscopy study
Techniques of electron microscopy have been applied to identification of minerals in coal and coal conversion products. The principal problem is making satisfactory thin-samples. Ion-milling has been used, but grinding and microtoming also show promise. Principal attention has been given to characterization of sulfides and clays, but many other minerals have been identified. Application of the technique to identification of the minerals in oil shale has been demonstrated. The great value of this method is the extraordinary detail with which mineral inclusions can be characterized. General topography, crystal type (including space group of complex crystalline forms), planar spacing and chemical composition can be determined using the large array of techniques available - bright and dark field imaging, electron diffraction, including convergent beam electron diffraction, x-ray emission spectroscopy and energy loss spectroscopy. 63 refences, 10 figures.
- Research Organization:
- Univ. of Illinois at Urbana-Champaign
- DOE Contract Number:
- AC02-76ER01198
- OSTI ID:
- 6876789
- Journal Information:
- Scanning Electron Microsc.; (United States), Vol. 3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL
CHEMICAL ANALYSIS
TRANSMISSION ELECTRON MICROSCOPY
SAMPLE PREPARATION
USES
CARBONATES
CLAYS
CRYSTAL STRUCTURE
ELECTRON DIFFRACTION
KEROGEN
OIL SHALES
OXIDES
PHOSPHATES
PYRITE
PYRRHOTITE
SAMPLE HOLDERS
TEMPERATURE EFFECTS
X-RAY EMISSION ANALYSIS
X-RAY SPECTROSCOPY
BITUMINOUS MATERIALS
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
COHERENT SCATTERING
DIFFRACTION
ELECTRON MICROSCOPY
ENERGY SOURCES
FOSSIL FUELS
FUELS
IRON COMPOUNDS
IRON SULFIDES
MATERIALS
MICROSCOPY
MINERALS
NONDESTRUCTIVE ANALYSIS
ORGANIC MATTER
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
SCATTERING
SPECTROSCOPY
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
010600* - Coal
Lignite
& Peat- Properties & Composition