Phys. Rev. Lett. 68, 83–85 (1992)Pressure-amorphized SiO2 α-quartz: An anisotropic amorphous solidReceived 1 October 1991; published in the issue dated 6 January 1992 Recent experiments [Kruger and Jeanloz, Science 249, 647 (1990)] have shown that the pressure-induced amorphous form of AlPO4 reverts to its original ‘‘single-crystal’’ form on release of pressure. Here we present the results of a Brillouin scattering study of the sister compound α-quartz, SiO2 (which can also be pressure amorphized but retains its amorphous structure on release of pressure), which shows that the recovered material is not elastically isotropic but retains a ‘‘memory’’ of its original crystallographic orientation. © 1992 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.68.83
DOI:
10.1103/PhysRevLett.68.83
PACS:
61.42.+h, 62.50.+p, 64.70.Kb, 78.35.+c
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