The incipient oxidation of pyrite
β Scribed by D.P. Tao; Y.Q. Li; P.E. Richardson; R.-H. Yoon
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 964 KB
- Volume
- 93
- Category
- Article
- ISSN
- 0927-7757
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X-ray Photoelectron Spectroscopy (XPS) was used to study mineral, synthetic and coalassociated pyrites, oxidized for various time intervals at low temperatures with humid air or oxygen. This was done to find out if XPS could detect, monitor and clarify pyrite surface-oxidative changes that influence
Two petrographic methods, namely long-wave fluorescence intensity measurements and a vitrinite elasticity index, were developed and used to detect incipient oxidation in coals subjected to simulated weathering conditions. The two methods are based on different physical properties of coal. However, t