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| Pyrochlore |
The formula is (Na,Ca)2Nb2O6(OH,F). It usually has included radioactive elements which are not part of the chemical equation.
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| Pyrochlore |
It is a member of the Pyrochlore group. Pyrochlore typically contains .05% Uranium and Thorium. Wikipedia does not mention practical uses but this seems the most likely possibility to me.
This sample was obtained from Oka, Quebec, Canada.
This sample was obtained from Oka, Quebec, Canada.
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