Show simple item record

dc.creatorMcAtee, James Lee, Jr
dc.date.accessioned 2007-08-21T01:04:34Z
dc.date.available 2007-08-21T01:04:34Z
dc.date.issued 1951
dc.identifier.urihttps://hdl.handle.net/1911/18356
dc.description.abstract Bohmite, gamma-AlOOH, has been found to exist in nature and may be prepared in the laboratory in a variety of ways. From the close similarity of the powder x-radiograms of bohmite and the mineral lepidocrocite, gamma-FeOOH, it has been concluded that the structures are analogous. The existence of the closely related compound gamma-ScOOH has clearly been established by x-ray diffraction and dehydration isobaric studies, but quantitative x-ray studies have not been made. There are two crystalline modifications of the monohydrate of aluminum oxide with the formula AlOOH. The modification corresponding to diaspore, alpha-AlOOH, has been found to be isomorphous with goethite,alpha-FeOOH, of known structure. The second modification corresponding to bohmite, gamma-AlOOH, is isomorphous with lepidocrocite, gamma-FeOOH. The structure of lepidocrocite has been determined by Ewing employing oscillation and rotation photographs of a naturally occurring single crystal. Even though bohmite occurs in nature, it has not been possible to obtain individual crystals suitable for single crystal x-ray studies. Milligan and Weiser, from dehydration isobars of scandium trihydroxide and x-ray diffraction studies, reported the existence of scandium oxide monohydrate, gamma-ScOOH, which they believed to be isomorphous with bohmite. In the present investigation the unit structure, space group symmetry, and detailed atomic arrangement of gamma-AlOOH and gamma-ScOOH have been determined. Since numerous attempts to grow single crystals of both of these monohydrates failed, it was necessary to confine the work done here to powder techniques.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectPhysical chemistry
dc.title Crystal structure of gamma-boehmite and gamma-scandium oxide monohydrate
dc.type.genre Thesis
dc.type.material Text
thesis.degree.department Chemistry
thesis.degree.discipline Natural Sciences
thesis.degree.grantor Rice University
thesis.degree.level Doctoral
thesis.degree.name Doctor of Philosophy
dc.identifier.citation McAtee, James Lee, Jr. "Crystal structure of gamma-boehmite and gamma-scandium oxide monohydrate." (1951) Diss., Rice University. https://hdl.handle.net/1911/18356.


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record