ˈchefkə̇ˌnīt, -evk- noun
( -s )
Etymology: German tschewkinit, from Konstantin V. Chevkin ( Tschewkin ) died 1875 Russ. general and chief of Dept. of Mines of Russia + German -it -ite
: a mineral approximately (Fe,Ca)(Ce,La) 2 (Si,Ti) 2 O 8 consisting of silicotitanate of iron, calcium, and rare-earth elements