A study of the mean-square displacement amplitudes of T and O atoms in framework silicates and aluminosilicates: evidence for rigid TO bonds, order, disorder, twinning and stacking faults in crystals

Downs, Robert T.2014-03-142014-03-141989-12-05etd-11212012-040124http://hdl.handle.net/10919/45947The mean-square displacement amplitudes (MSDA) of the tetrahedral cations Si and Al are compared to the MSDA of their coordinated O atoms in framework silica polymorphs and aluminosilicate structures. Criteria are established which indicate order, structural disorder or substitutional disorder in a framework crystal.iv, 59 leavesBTDapplication/pdfenIn CopyrightLD5655.V855 1989.D688Aluminum silicates -- TestingCrystallographyA study of the mean-square displacement amplitudes of T and O atoms in framework silicates and aluminosilicates: evidence for rigid TO bonds, order, disorder, twinning and stacking faults in crystalsThesishttp://scholar.lib.vt.edu/theses/available/etd-11212012-040124/