Abstract
A new modification of elementary boron has been prepared by the decomposition of purified BBr3 on hot W and Re filaments at various temperatures close to 1200°C.
The unit cell is tetragonal; cell dimensions are: a = 10.12 A, c = 14.14 A. The measured density is 2.364 ± 0.005 g/cm3, indicating that the unit cell contains 192 boron atoms, possibly arranged at the vertices of 16 icosahedra.
Recent work with this phase indicates that the modification is metastable; when melted and subsequently cooled the tetragonal form was found to transform to the rhombohedral modification recently reported by Sands and Hoard. [1]
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Sands, D. E. and Hoard, J. L., J. Am. Chem. Soc. 79 (1957) 5582.
Hoard, J. L., These Proceedings p. 1; Structure and polymorphism in elemental boron, in From Borax to Boranes (Advances in Chemistry Series) (Washington, Am. Chem. Soc, 1960).
Hoard, J. L., Hughes, R. E., and Sands, D. E., J. Am. Chem. Soc. 80 (1958) 4507.
McCarty, L.V., Kasper, J. S., Horn, F.H., Decker, B. F., and Newkirk, A. E., J. Am. Chem. Soc. 80 (1958) 2592.
Náray-Szabó, St. v. and Tobias, C.W., J. Am. Chem. Soc. 71 (1949) 1882.
Lagrenaudie, J., J. Chim. Phys. 50 (1953) 629; Chem. Abs. 48 (1954) 4903.
Rollier, M. A., Proc. XI Congr. Pure Applied Chem. 5 (1947) 935, publ. 1953; Chem. Abs. 47 (1953) 11941 h.
Laubengayer, A.W., Hurd, D.T., Newkirk, A. E., and Hoard, J.L., J. Am. Chem. Soc. 65 (1943) 1924.
Powell, C. F., Vapor Plating, Chapter 5, John Wiley & Sons, Inc. New York, 1955.
Halla, F. and Weil, R., Z. Krist. 101 (1939) 435.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1960 Springer Science+Business Media New York
About this paper
Cite this paper
Talley, C.P., Post, B., LaPlaca, S. (1960). A New Modification of Elemental Boron. In: Kohn, J.A., Nye, W.F., Gaulé, G.K. (eds) Boron Synthesis, Structure, and Properties. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-6572-1_11
Download citation
DOI: https://doi.org/10.1007/978-1-4899-6572-1_11
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4899-6265-2
Online ISBN: 978-1-4899-6572-1
eBook Packages: Springer Book Archive