Crystal structure of gamma-boehmite and gamma-scandium oxide monohydrate

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dc.creatorMcAtee, James Lee, Jren_US
dc.date.accessioned2007-08-21T01:04:34Zen_US
dc.date.available2007-08-21T01:04:34Zen_US
dc.date.issued1951en_US
dc.description.abstractBohmite, 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.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.callnoThesis Chem. 1951 McAteeen_US
dc.identifier.citationMcAtee, James Lee, Jr. "Crystal structure of gamma-boehmite and gamma-scandium oxide monohydrate." (1951) Diss., Rice University. <a href="https://hdl.handle.net/1911/18356">https://hdl.handle.net/1911/18356</a>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/18356en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectPhysical chemistryen_US
dc.titleCrystal structure of gamma-boehmite and gamma-scandium oxide monohydrateen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentChemistryen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophyen_US
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