found: Work cat.: Kalyoncu, R.S. High-purity, fine particle boron ... 1986
found: Web. 3
found: CA 10th Chemical Substances:p. 10719cs
found: Hackh chem. dict.
found: Hawley chem. dict.
found: McGraw-Hill dict. sci. tech.
found: Old catalog heading(Boron nitride)
found: Boron nitride - an overview, via ScienceDirect, June 30, 2020(Boron nitride (BN) is a chemical compound that is isoelectronic and isostructural to carbon with equal composition of boron and nitrogen atoms; Cubical boron nitride (cBN) is the second hardest material known behind diamond)