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Additional
cenosphere
English Wikipedia - The Free Encyclopedia
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Cenosphere
A
cenosphere
is a lightweight, inert, hollow sphere made largely of
silica
and
alumina
and filled with air or inert gas, typically produced as a
byproduct
of
coal
combustion
at
thermal power plants
. The color of cenospheres varies from gray to almost white and their
density
is about , which gives them a great
buoyancy
.
Cf.
glass microspheres
.
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