By J. L. Hoard (auth.), J. A. Kohn, W. F. Nye, G. K. Gaulé (eds.)
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Extra resources for Boron Synthesis, Structure, and Properties: Proceedings of the Conference on Boron
6 function of cumulative ampere-hours are presented in Fig. 5. All concentrations are relatively constant except that of the fluoride ion. This is conttary to what is expected in the electrolysis of a halide-fluoborate system where the potassium fluoride concentration increases as boron fluoride is reduced to boron. At the start the boron concentration increases for a short period of time. This probably represents the solution of boron from the carbide. This observation is vividly illustrated inFig.
S. Pat. 1,774,410, Aug. 26, 1930. 4. Andrieux, J. , Ann. chim. 12 (1929) 423. 5. , Compt. rend. 193 (1931) 776. 6. Mellor, D. , Cohen, S. , and Underwood, E. , Australian Chem. lnst. J. & Proc. 3 (1936) 329. 7. Laubengayer, A. , Hurd, D. , Newkirk, A. , J. Am. Chem. Soc. 65 (1943) 1924. 8. Formstecher, M. , Compt. rend. 221 (1945)747. 9. Cooper, H. S. Pat. 2,572,248, Oct. 23, 1951. 10. Cooper, H. S. Pat. 2,572,249, Oct. 23, 1951. 11. Fetterley, G. S. Pat. 2,542,916, Feb. 20, 1951. 12. Murphy, G.
Molecules of BBr3 colliding with the elemental boron sampie form a lower halide (or halides). This halide diffuses to a cooler portion (approximately 900°C) of the tube , where it decomposes. After 700 hr the tube was broken open and the deposit examined. Approximately 30% of the boron had been transported to a lumpy, microcrystalline mass which adhered to the quartz tube. This experiment yielded very impure boron because of the evidence that the product had reacted slowly with the quartz, 4B + 3Si~ ---..
Boron Synthesis, Structure, and Properties: Proceedings of the Conference on Boron by J. L. Hoard (auth.), J. A. Kohn, W. F. Nye, G. K. Gaulé (eds.)