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fordite
What is the chemical makeup, likely origin, for my ~5 pound radioactive mica?
0
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What is the likely chemical makeup and likely origin, for my ~5 pound mica that is planar on an inch scale (not large sheets) and quite radioactive?
asked
Nov 28, 2017
by
M rowland
(
120
points)
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1 Answer
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Not quite sure I get your question. Most mica isn't radioactive. Perhaps you are confusing it with a radioactive mineral with a micaceous appearance such as torbernite? Please elaborate on your question.
answered
Nov 30, 2017
by
hershel
(
51,320
points)
The rock has been called a biotite mica by a geologist in AZ. it is not green so does not look like a torbernite. The rock emits 2 mr/hr on contact and is decidedly mica and flaky. The question is where could such a rock come from and how might the U or Th be incorporated into the mica?
Biotite mica is not radioactive. Perhaps it is included with a radioactive mineral such as zircon or uraninite.
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