Do dislocations and stacking faults increase the oxidation rate of pyrites?

Autor:	J. P. Tamilia, Robert A. Graham, Kenneth S. Vecchio, Donald V. Martello, J.R. Diehl, S.S. Pollack
Rok vydání:	1994
Předmět:	Thermal shock Materials science Scanning electron microscope Metallurgy Analytical chemistry Stacking engineering.material X-ray photoelectron spectroscopy Geochemistry and Petrology engineering Relative humidity Pyrite Dislocation Stacking fault
Zdroj:	Geochimica et Cosmochimica Acta. 58:4657-4665
ISSN:	0016-7037
DOI:	10.1016/0016-7037(94)90198-8
Popis:	XPS, SEM and TEM studies were made on coal, non-coal, and shock-loaded pyrites that had been experimentally weathered under high relative humidity. Reactivity (oxidation) of the different pyrite samples may be related to their stacking fault densities. A coal pyrite sample that had the highest stacking fault concentration was also the most reactive pyrite. No systematic relationship between reactivity and dislocation density was observed. Shock-loaded samples exposed to mean bulk shock temperatures between 175 and 475°C showed an increase in the number of reactive sites and shock-loaded samples exposed to mean bulk shock temperatures between 500 and 700°C showed decreases in the number of reactive sites.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::eb7dd4035bcfa805cc08bf12a760b8d3 https://doi.org/10.1016/0016-7037(94)90198-8 Zobrazit plný text záznamu