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POTD/2022-04-29
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Picture of the day archives
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Picture of the day
Calcite
is a
carbonate mineral
and the most stable
polymorph
of
calcium carbonate
(CaCO
3
). This photograph shows
fluorescence
and
birefringence
in a calcite crystal with a 445-nanometre
laser
.
Photograph credit: Jan Pavelka
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