Calciosamarskite : (Ca,U4+)Fe3+(Nb,Ta,Ti)2O8
Samarskite-(Y) : YFe3+Nb2O8
Mindat locality:
Photo added to mindat.org
“Dark brown calciosamarskite intergrown with black samarskite-(Y).
3.0 cm sample. S402-110
Excalibur Mineral specimen.”
Jeff Weissman - 7th May 2008
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