Wiktionary
ixiolite
n. (context mineralogy English) A monoclinic-prismatic mineral containing iron, manganese, niobium, oxygen, tantalum, and tin.
Wikipedia
Ixiolite
Ixiolite is an accessory oxide mineral found in granitic pegmatites. It is an oxide with the general chemical formula ( Ta, Nb, Sn, Mn, Fe)O or (Ta,Mn,Nb)O.