nenadkevichite
/nɛˈnadkəvɪtʃʌɪt/Mineralogy
noun
An orthorhombic hydrated silicate of sodium, calcium, niobium, and titanium, (Na,Ca)(Nb,Ti)Si2O7·2H2O, which occurs as pale yellow crystals.
Origin
1950s; earliest use found in Mineralogical Abstracts. From Russian nenadkevičit from the name of Konstantin Avtonomovič Nenadkevič, Russian mineralogist and geochemist + -it.