What is "kampfite"

n. (context mineralogy English) A monoclinic-domatic light blue gray mineral containing aluminum, barium, carbon, chlorine, oxygen, silicon, sodium, strontium, and titanium.

Kampfite is a rare barium silicate– carbonate– halide mineral with formula: Ba(SiAl)O(CO)Cl. Discovered in 1964 and described in 2001, it is named after Anthony R. Kampf. The mineral is known only from Fresno County, California.