High temperature crystal structure of a 3:2 mullite from neutron diffraction data

Brunauer, G.; Boysen, Hans; Frey, Friedrich; Hansen, T. und Kriven, W.M. (2001): High temperature crystal structure of a 3:2 mullite from neutron diffraction data. In: Zeitschrift fur Kristallographie, Bd. 216, Nr. 5: S. 284-290

Abstract

High temperature neutron investigations up to 1950 K of 3:2-sintered mullite show a smooth reversible behaviour which can be described by a rotation of more or less rigid TO4 (T = Al(2),Si)-tetrahedra and accompanying distortions of the Al(1)O6-octahedra. Large atomic displacement parameters along the c-direction, including static parts, match to respective structural modulations in the mullite structure. A comparison of a pristine and a preheated sample reveals an irreversible depopulation of the Al(2) atomic site in favour of the Al(*) site.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Geowissenschaften > Department für Geo- und Umweltwissenschaften > Kristallographie und Materialwissenschaft
• Themengebiete: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
• Sprache: Englisch