Aluminium magnesium boride
Aluminium magnesium boride or Al3Mg3B56, colloquially known as BAM, is a chemical compound of aluminium, magnesium and boron. Whereas its nominal formula is AlMgB14, the chemical composition is closer to Al0.75Mg0.75B14.
Source: Wikipedia — Aluminium magnesium boride (CC BY-SA 4.0)