Diamond Mineral
2009
is diamond the hardest mineral in the universe?
for my opinion diamond is not the hardest mineral because there are more unknown minerals scattered in the earth and the universe. do you people agree with me or not?
The hardness of minerals is generally measured using the Mohs scale of mineral hardness.
On this 1-to-10 scale, talc is a 1, apatite (bone mineral) is a 5, and diamond is a 10. There are some substances that would have a Mohs value of >10, but they are unusual forms of carbon (carbon nanorods, fullernes, etc.)
The reason diamond is so hard is because it is a crystal lattice that is held together by *covalent* bonds of great strength, not ionic bonds (like in salt crystals)
The hardness of substances can in fact be calculated from these bond strengths, and diamond is about has hard as it gets. Further, we already know about the chemical properties of just about all the elements on the periodic table, and elements with a larger atomic number, while theoretically able to exist, are likely to be extremely radioactively unstable, as well as softer.
So diamond, while it might not be the absolute hardest substance in the universe, is going to be tricky to beat.
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