The KhF-1 and KhF-2 bounding gas mines were Russian Landmines developed during World War II, though they were not deployed during the conflict . Instead of a chemical warhead, the mines when triggered by an operator several hundred meters away, bounded into the air and shattered projecting a chemical gas over an area of between 250 to 300 square meters.
Specifications
References
KhF-1 and KhF-2 bounding gas mines Wikipedia(Text) CC BY-SA