High-pressure phases of SiO2 made in air by Fedoseev-Derjaguin laser process

M. Alam, T. DebRoy, R. Roy, E. Breval

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Exposure of a falling stream of 1 μm average size α-quartz particles to a continuous wave or pulsed CO2 laser beam in air resulted in the formation of a complete series of high-pressure phases of silica: coesite, stishovite, and apparently even denser forms with α-PbO2 and Fe2N structures. Since the laser exposure technique works with the carbon black to diamond transition, the technique is confirmed as a simple and generally applicable means to achieve the same effects as exposure to several hundred kilobars pressure.

Original languageEnglish (US)
Pages (from-to)1687-1689
Number of pages3
JournalApplied Physics Letters
Issue number18
StatePublished - 1988

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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