Barium carbide

Barium carbide (also referred to as Barium ethynediide or Barium acetylide) is a chemical compound in the carbide family with the chemical formula BaC2.
Preparation.
Barium carbide was first synthesized as an impure compound in the Soviet Union in 1986 by reducing Barium carbonate powder with metallic Magnesium in the presence of Carbon-14. It can also be prepared by heating a Barium amalgam and Carbon powder mixture in a Hydrogen current. The pure compound is prepared by reducing Barium oxide with Carbon at a high temperature.
Properties.
Barium carbide reacts similarly to Calcium carbide, but it's more fusible. When exposed to extreme heat, the Barium will evaporate leaving behind crystals of Graphite. It can also absorb the Carbon in a solution at high temperatures.
Hazards.
Barium carbide can cause damage to the GI tract and irritation in the skin and eyes