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Michael Jacob February 22, 2012 02:14AM
Hi! The old label had the ID for pitchblende from Spruce Pine. Its really hot--pegs my meter on the highest setting. Any simple test to make sure it isn't polycrase? Thanks--please reply to my email if possible.. MJ
open | download - 2012_JAN_radioactive 004.jpg (331.2 KB)
Fred E. Davis February 22, 2012 03:07AM
Probably the most significant factor that it's uraninite is that polycrase has not been reported from McKinney mine. Your description of the relative radioactivity would also suggest uraninite which exhibits about 10 times the activity of polycrase. You could also check the density since uraninite is more dense than polycrase.
Alfredo Petrov February 22, 2012 03:16AM
Another test you could do would be for possible density change after heating.
Reiner Mielke February 25, 2012 03:55PM
Uraninite is soluble in Nitric Acid, Polycrase is not.
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