Investigations on the Deformation of Experimentally Shock-Loaded Biotites Using X-Ray Single Crystal Diffraction Techniques

Hartmut Schneider
Mineralogisches Institut der Universität Karlsruhe, Germany1
1Present address: Forschungsinstitut der Feuerfestindustrie, An der Elisabethkirche 27, 5300 Bonn, Germany.

Summary: The deformation of biotite single crystals submitted to experimental shock-pressures of about 200 and 400 kb with direction of the shock wave parallel to [001] was investigated by X-ray precession and Weissenberg techniques. The X-ray analysis reveals a ‘fracturing’ of the biotite crystals upon pressure release into relatively large lattice blocks (> 1000 Å), which increases with the degree of shock compression. Deformation is inferred to take place by gliding and/or microfracturing processes parallel to the (010) and (110) lattice planes. Chains of tetrahedra running parallel to [100] and [110] probably exert a controlling influence on shock deformation mechanisms.

Mineralogical Magazine; March 1978 v. 42; no. 321; p. 41-44; DOI: 10.1180/minmag.1978.042.321.05
© 1978, The Mineralogical Society
Mineralogical Society (