U. Alter, J. Härtwig: X-ray Topographic Investigation of Quartz Single Crystals at High Temperature, up to 1185°C

Crystal Research and Technology

Cryst. Res. Technol. 35 (2000) 207 - Abstract -

U. Alter, J. Härtwig*

Germering, Germany
*European Synchrotron Radiation Facility, Grenoble, France

X-ray Topographic Investigation of Quartz Single Crystals at High Temperature, up to 1185°C

Real time experiments were performed to study the structural behaviour of monocrystalline quartz at high temperatures. White beam diffraction topography in transmission geometry was used. A creation of Dauphine-twins took place slightly below the alpha-beta-phase transition temperature. The diffraction contrast of twins and temperature stresses disappeared above the alpha-beta-phase transition temperature. Up to 1185°C neither changes of the defect structure nor a creation of new defects were observed. A precursor for a beginning of a reconstructive phase transition from quartz to cristabolite could not be observed within a time interval of 2h at 1180°C

Keywords: topography, quartz, single crystal, high temperature

The full text of this paper in pdf-Format:

If you came directly to this page, click this symbol

to go to the homepage of CRT.