1) Beryllium compound 
Beryllide is an intermetallic compound of beryllium with other metals, e.g. zirconium, tantalum, titanium, nickel, or cobalt. Typical chemical formulae are Be12Ti and FeBe5. These are hard, metal-like materials that display properties distinct from the constituents, especially with regards to their resilience toward oxidation. ==Applications and p...