Quote:
Originally Posted by Pyrotex
The density of solid Hydrogen, I cannot find (yet), but is unlikely to be greater than 10 times the density of LH2. So, let's assume worst case, and call it 0.7 g·cm−3
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I think you're spot on—metallic hydrogen between 3 and 4 Mbar looks to be between .45 and 1.3 g/cm^3.
-source
Quote:
In 1973, a group of Russian experimenters may have produced metallic hydrogen at a pressure of 2.8 Mbar. At the transition the density changed from 1.08 to 1.3 g/cm^3
Hydrogen
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So, I agree—there doesn't seem to be any way a metallic hydrogen core could contribute the necessary mass to account for earth's total density.
~modest
