æschynite

æschynite Min.

(ˈɛskɪnaɪt)

[f. Gr. αἰσχύνη disgrace + -ite. Named ‘by Berzelius, in allusion to the inability of chemical science, at the time of its discovery, to separate the two unlike substances, titanic acid and zirconia.’ Dana.]

A blackish mineral of the Tantalite group found in different parts of Russia.