Show simple item record

Examination of the Thermal Decomposition of Chrysotile

dc.contributor.advisorCandela, Philip Aen_US
dc.contributor.advisorWylie, Ann Gen_US
dc.contributor.authorCrummett, Courtneyen_US
dc.date.accessioned2005-08-03T14:25:24Z
dc.date.available2005-08-03T14:25:24Z
dc.date.issued2005-04-22en_US
dc.identifier.urihttp://hdl.handle.net/1903/2485
dc.description.abstractThe decomposition of pure chrysotile from Thetford, Quebec heated at constant temperature in air from 200-1000°C for 4 to 720 hours was studied by using X-ray diffraction and optical microscopy techniques. No morphological changes were observed optically below 450ºC and 24 hours, although X-ray diffraction data suggest that chrysotile degrades then recrystallizes below 450˚C. Throughout the temperature range of 500-1000ºC, changes in the refractive indices observed included several cycles of increasing and decreasing magnitudes and ranges. Chrysotile was no longer present above 575˚C and 24 hours. The lowest temperature of forsterite appearance was at 500˚C and 720 hours and the lowest temperature of enstatite appearance was at 800˚C for 8 hours. Broad reflections were observed within 500-750˚C at 16-8Å, 4Å, and 3Å spacings. These reflections suggested the possible presence of talc and tridymite-like mineral phases. X-ray diffraction and optical microscopy results of this study show that the decomposition of chrysotile is more complex than previously understood.en_US
dc.format.extent2346387 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.titleExamination of the Thermal Decomposition of Chrysotileen_US
dc.typeThesisen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentGeologyen_US
dc.subject.pqcontrolledGeologyen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record