pic rota nite

[Pref. picro-; prob. English (ti)tan(ium), and suff. -ite ( Min.).] Min.: A variety of Men acc a nite (q. v.), which contains from 10 to 15 per cent. of magnesia, the formula being (FeOMgO)TiO2. Specific gravity, 4-293-4-313. Found at Warwick, New York. tephroite.] pic-ro-těph-rô-ite, s . [Pref. picro- , and Eng. Min.: A variety of Tephroite (q. v.), in which part of the protoxide of manganese is replaced by magnesia.