# On Mohs' scale, or another, what is the hardness of Neutronium in its native environ?

1. Apr 13, 2008

### jquark

on Mohs' scale what is the hardness of neutronium in its native environment?

we record the mass of a teaspoon full, so compared to the ratio of EM to gravity, what is the next level to fermi gas of degenerate matter? just how hard is it? an order of magnitude estimate will be fine. seems if a mountain on a 15km pulsar would be a millimeter and if it shifted on a magnetar it would blast (gee it doesnt have symbol font) $$\gamma$$ rays across the galaxy, it must be...unusual. [tex]\gamma[\tex] i am now an official texican.

2. Apr 18, 2008

### jquark

i wasnt being facetious.

similar to the charge mass ratio of the electron, what is the next ratio to this state? how strong is the weak force?

gravitationally speaking how much mass does a neutron star have, we can start with the core as a natural environment. what kind of pressure is there? counter-pressure would be a good measure of hardness. within some philosophical order of magnitude. (in other words, the numbers are probably accurate but its our minds...)

i ran into the equations for relativistic stars a while ago i may run into them again sometime.

3. Apr 20, 2008

### Chronos

Neutronium is science fiction. You can derive an equation of state for the surface of a neutron star, but, it does not translate into earthly measures like mohr's hardness. The nature of neutron star interiors is very uncertain. It may be fairly similar to the surface, or an exotic quark soup.

4. Apr 24, 2008

### Khursed

I don't know the hardness of "neutronium" but heres a quote from wiki, about pauli's exclusion principle, and our friendly neutron star.

That should give ya a small idea of its hardness.

5. Apr 25, 2008

### jquark

excellent. i couldnt remember names of other scales. i ran across something in a book review i believe about this kind of thing, saying that neutron stars' exterior is a solid crust, but the interior is more of a dense liquid. so the core wouldnt quite be the place to look.

that was well written it almost sounded like sagan talking for most of it.

thank you :) element number zero.

6. Apr 25, 2008

### jquark

i was looking at some fields, with three quarks in the neutron, that combination of them must be harder than the set for the proton. weak force is so strong.

and still half life of a proton 10^33y if that and neutron 15 min or so.

they can hold back a near-black hole wow