What is "bystrite"

n. (context mineral English) A trigonal-ditrigonal pyramidal yellow mineral containing aluminum, calcium, hydrogen, oxygen, potassium, silicon, sodium, and sulfur.

Bystrite is a silicate mineral with the formula (Na,K)Ca(SiAl)OS•(HO), and a member of the cancrinite mineral group. It is a hexagonal crystal, with a 3m point group. The mineral may have been named after the Malaya Bystraya deposits in Russia, where it was found.

Bystrite is a cancrinite mineral and exhibits similar physical properties, composition and structure as other cancrinites.