Magnesium diboride, MgB2, is an ionic substance with a hexagonal crystal structure. It is a compound with alternate layers of magnesium, and boron. Purity99,Particle size: 5- 10um About Magnesium Difboride MgB2 Poudre: Magnesium boride, or MgB2is a inorganic compound. The molecular formula of magnesium diboride is MgB2. Dark gray insoluble solid. Its an ionic crystal with a hexagonal crystalline structure. This intercalated compound has alternating layers of boron and magnesium. This comp