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Template:POTD/2012-06-17
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Picture of the day
A crystalline fragment of an
ingot
of
zinc
(upper left), a sample of
sublimed
-
dendritic
zinc, and a
1 cm
3
cube for comparison. Zinc (or "spelter") is the
24th most abundant element
in the Earth's crust. It is an
essential mineral
for humans;
zinc deficiency
affects about two billion people in the developing world and is associated with many diseases.
Photo:
Alchemist-hp
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