what can you tell me about metallic hydrogen.?

Question

like how is it formed, pressure, temperature, uses.

is it a solid or a liquid, is it reactive.

http://www.llnl.gov/str/Nellis.html

http://www.aip.org/pnu/1996/split/pnu263-1.htm

Answer 1

Fascinating....

These sites speak of both solid and liquid metallic hydrogen. Pressure: about 1.4 million atmospheres, Temperature (surprisingly): about 3,000 deg. Kelvin. Uses: much speculation, but obviously little fact as yet....

Answer 2

Metallic hydrogen results when hydrogen is sufficiently compressed and undergoes a phase change; it is an example of degenerate matter.

Metallic hydrogen consists of a crystal lattice of atomic nuclei (namely protons), with a spacing that is significantly smaller than a Bohr radius; indeed, the spacing is more comparable with an electron wavelength (see De Broglie wavelength). The electrons are unbound and behave like the conduction electrons in a metal.

Though topping the periodic table's alkali metal column, hydrogen is not an alkali metal — under ordinary conditions, that is. In 1935, however, Nobel Prize-winning physicist Eugene Wigner predicted that under immense pressure, hydrogen atoms would indeed join their first-group kin, relinquishing their proprietary hold over their electrons.

The electronic energy band gap of hydrogen in its uncompressed state is about 15 eV, making it an insulator, but as the pressure increases significantly, the band gap gradually falls to 0.3 eV. Because 0.3 eV are provided by the thermal energy of the fluid (the temperature became about 3000 K due to compression of the sample), the hydrogen can at this point be considered fully metallic.

It may be possible to produce substantial quantities of metallic hydrogen, with practical benefit. The existence has been theorized of a form (called 'Metastable Metallic Hydrogen', abbreviated MSMH) that would not immediately revert to ordinary hydrogen upon release of pressure. In addition, it would make an efficient fuel itself (and a clean one, with only water as an end product); 9 times as dense as standard hydrogen, it would give off considerable energy when reverting to standard hydrogen. "Burned" more quickly, it could be a propellant with five times the efficiency of liquid H2/O2, the current space shuttle fuel. Unfortunately, the Lawrence Livermore experiments produced metallic hydrogen too briefly to determine whether metastability is possible.

Theory has been put forward that metallic hydrogen may be a superconductor as high as room temperatures (290K), far higher than any other known candidate material

Answer 3

hydrogen isn't a metal, it's a gas. i don't think its possible to have metallic hydrogen. who told you about this metallic hydrogen?