astrophyllite
noun
as·tro·phyl·lite
ˌastrəˈfiˌlīt
plural -s
: a mineral (K, Na)2(Fe, Mn)TiSi4O14(OH)2 consisting of a basic silicate of potassium or sodium, iron or manganese, and titanium
Word History
Etymology
International Scientific Vocabulary astr- + Greek phyllon leaf + International Scientific Vocabulary ite; originally formed as German astrophyllit