richterite
noun
rich·ter·ite
ˈriktəˌrīt
plural -s
: a mineral (Na,K)2(Mg,Mn,Ca)6Si8O22(OH)2 that is a variety of amphibole containing as bases sodium, magnesium, manganese, potassium, and calcium
Word History
Etymology
German richterit, from Theodor Richter †1898 German metallurgical chemist + German -it -ite