naujakasite
/naʊjəˈkazʌɪt/Mineralogy
noun
A monoclinic hydrated silicate of sodium, potassium, iron (ii), manganese, iron (iii), and aluminium, found as white platy crystals.
Origin
1930s. From Naujakas- (in Naujakasik, name of a point on the southern coast of Tunugdliarfik Fiord, Greenland) + -ite.