Wiktionary
sonolite
n. (context mineralogy English) A monoclinic-prismatic mineral containing fluorine, hydrogen, manganese, oxygen, and silicon.
Wikipedia
Sonolite
Sonolite is a mineral with formula Mn(SiO)(OH,F). The mineral was discovered in 1960 in the Sono mine in Kyoto Prefecture, Japan. In 1963, it was identified as a new mineral and named after the Sono mine.