Boron Modifications Produced in an Induction-Coupled Argon Plasma
- 28 February 1969
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 163 (3870) , 935-937
- https://doi.org/10.1126/science.163.3870.935
Abstract
Most of the small particles (50 to 100 micrometers in diameter) of microcrystalline beta-rhombohedral boron that quickly transit an argon plasma maintained within a radio-frequency induction-coupled torch emerge as better crystallized spheroids of the same crystalline form and nearly the same size as the starting material. A few crystals of each of four distinctive, well-faceted habits are formed along with the general product. Three of these types are monocrystals of the beta-rhombohedral polymorph, of the tetragonal-III modification, and of an unreported cubic form of boron. Specimens of the fourth type are polycrystals of another unreported form of boron, apparently consisting of many hexagonal platelets stacked in an imprecise fashion.Keywords
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