Zakharovite
Zakharovite is a mineral, a silicate of sodium and manganese; formula Na4Mn5Si10O24(OH)6·6H2O. It has a yellow colour with a pearly lustre. Discovered in 1982 in the Kola peninsula of Northern Russia, it is named after Evgeii Evgen'evich Zakharov (1902–1980), the director of the Moscow Institute of Geological Exploration.