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ArticleName Structure and properties of metallic hydrogen
DOI 10.17580/or.2015.02.07
ArticleAuthor Zuev V. V.

Mekhanobr Engineering JSC (Russia):

Zuev V. V., Doctor of Geology and Mineralogy, Leading Researcher,


The publication continues the author’s series of papers on the problem of studying nature and properties of mineral substances, corresponding to the extreme P-T conditions of their formation in the central zones of Earth and also other planets. Metallic hydrogen is one of such substances, and scant information is available about it in the literature, this paper challenging this lack of knowledge. A probable structure, properties and conditions of formation of hydrogen metallic phase are considered in the paper. On the basis of the atom kernels and binding electrons crystal chemistry, developed by the author, a body-centered cubic lattice structure with elementary cell parameter a0 = 1.016 Å, density ρ = 3.17 g/cm3, hardness, close to that of diamond, conditions of formation Р = 3000 GPa and thermodynamic stability Tmelting = 6500 K are assumed in the paper. This melting temperature seems to be a relatively low value, if extremely high pressure of metallic hydrogen formation is taken into consideration. Hydrogen kernel ionic radius is calculated to be ri(H1+) = 0.15 Å, and its variation is determined with respect to coordination. The Earth’s inner core hydride hypothesis is subjected to criticism in favor of the hypothesis of the Earth’s inner core composition from Fe-Co-Ni elements in hypervalent states.

keywords Metallic hydrogen, hydrogen metallic phase structure and properties, ionic radiuses of hydrogen cation, criticism of the Earth’s inner core hydride hypothesis, arguments in favor of the Earth’s inner core composition from Fe-Co-Ni elements

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