Coal
Author: admin
What is the ratio in volume of coal to the diamond it becomes?
I know that this varies depending on the type or quality of coal–a range of possible volumes will do just fine.
Coal doesn,t turn into diamond, really. Diamond comes from the conversion of graphite (coal is a near-surface rock; diamond forms at very very great depth in the mantle). Graphite is the mineral that would form if you removed all of the oxygen and hydrogen and other stuff from coal and had it in a place where the atoms would mineralize.
Density of coal is around or slightly less than 1 (most coal floats or almost floats in water, although it clearly depends on the coal variety under consideration). Diamond has a density of about 3.5, or roughly 3.5 times the density of coal, so the volume of diamond formed from coal would be about 30 % that of the coal, if in fact it formed that way (the volume would be reduce by about 70 %).
The density of graphite is about 0.6 that of diamond, so there is a volume reduction of about 40 % when diamond forms from graphite.
Coal Mining
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