hollandite

hollandite

[′hä·lən‚dīt]
(mineralogy)
Ba(Mn2+,Mn4+)8O16 A silvery-gray to black mineral composed of manganate of barium and manganese; occurs as crystals.
References in periodicals archive ?
Mineralogical composition of the fines at Balaghat and Ukwa mines is similar in nature and consists of Hollandite, Braunite, Psilomelane, Hematite, Apatite and Quartz.
Balaghat Hollandite, Braunite, Psilomelane, Hematite, Quartz and Apatite.
French scientists summarize results from their research into hollandite, zirconolite, zirconolite-base glass-ceramics, and borosilicate glasses as matrices in which to store highly radioactive nuclear waste for a very long time.