Formula: U(Nb,Ta,)2O8 Hexagonal
Liandratite is a rare yellow to brown mineral found as metamict crusts in granite pegmatites.
MARATHON COUNTY: Liandratite has been tentatively identified from the pegmatites at the Koss Pit (SW sec. 2 T.27 N. R.5E.) SW of Rib Mountain (Buchholz, Falster and Simmons, 1999, 2000).
— Liandrite/ petscheckite is found in pegmatites at the Wimmer #3 Pit (SW sec. 2 T.27 N. R.5E.) SW of Rib Mountain (Buchholz, and Simmons, 2002).