@ m1tanker78
I didn't say it, but I do believe that is pure boron. I think you misunderstand the process - no melting of the boron is involved. All borides and
oxides and most of the magnesium should have been removed by the leeching, so, though I don't have much proof, I do think it is pretty pure. For a
similar reaction giving 93% pure boron see:
http://www.inoe.ro/JOAM/pdf7_1/Yavas.pdf |