General Information:
Chemical Formula:U++++++(Nb,Ta)2O8
Composition:(Molecular Weight = 578.25 gm)Uranium 41.16 %
U Tantalum 9.39 %
TaNiobium 27.31 %
NbOxygen 22.13 %
O Empirical Formula: UNb1.7Ta0.3O8
Environment:Epitaxial crust on petschekite crystals.
IMA Status:Approved IMA 1978
Locality:Antsaoka I pegmatite, Berere region, near Tsaratanana, Madagascar.
Name Origin:Named for Georges Liandrat and his wife, of Samoens, France, who had prospected extensively in Madagascar.
Physical Properties: Cleavage:None
Color:brown, brownish yellow, or yellow.
Density:6.8
Diaphaniety:Translucent
Habits:Metamict - Mineral originally crystalline, now amorphous due to radiation damage., Encrustations - Forms crust-like aggregates on matrix.,
Hardness:3.5 - Copper Penny
Luster:Vitreous (Glassy)
Streak:yellow
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