Synthesis of sodium polyhydrides at high pressures

Viktor V. Struzhkin; Duck Young Kim; Elissaios Stavrou; Takaki Muramatsu; Ho Kwang Mao; Chris J. Pickard; Richard J. Needs; Vitali B. Prakapenka; Alexander F. Goncharov

doi:10.1038/ncomms12267

Synthesis of sodium polyhydrides at high pressures

Viktor V. Struzhkin^*, Duck Young Kim, Elissaios Stavrou, Takaki Muramatsu, Ho Kwang Mao, Chris J. Pickard, Richard J. Needs, Vitali B. Prakapenka, Alexander F. Goncharov

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

76 Scopus citations

Abstract

The only known compound of sodium and hydrogen is archetypal ionic NaH. Application of high pressure is known to promote states with higher atomic coordination, but extensive searches for polyhydrides with unusual stoichiometry have had only limited success in spite of several theoretical predictions. Here we report the first observation of the formation of polyhydrides of Na (NaH 3 and NaH 7) above 40 GPa and 2,000 K. We combine synchrotron X-ray diffraction and Raman spectroscopy in a laser-heated diamond anvil cell and theoretical random structure searching, which both agree on the stable structures and compositions. Our results support the formation of multicenter bonding in a material with unusual stoichiometry. These results are applicable to the design of new energetic solids and high-Temperature superconductors based on hydrogen-rich materials.

Original language	English
Article number	12267
Journal	Nature Communications
Volume	7
DOIs	https://doi.org/10.1038/ncomms12267
State	Published - 28 Jul 2016
Externally published	Yes

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title = "Synthesis of sodium polyhydrides at high pressures",

abstract = "The only known compound of sodium and hydrogen is archetypal ionic NaH. Application of high pressure is known to promote states with higher atomic coordination, but extensive searches for polyhydrides with unusual stoichiometry have had only limited success in spite of several theoretical predictions. Here we report the first observation of the formation of polyhydrides of Na (NaH 3 and NaH 7) above 40 GPa and 2,000 K. We combine synchrotron X-ray diffraction and Raman spectroscopy in a laser-heated diamond anvil cell and theoretical random structure searching, which both agree on the stable structures and compositions. Our results support the formation of multicenter bonding in a material with unusual stoichiometry. These results are applicable to the design of new energetic solids and high-Temperature superconductors based on hydrogen-rich materials.",

author = "Struzhkin, {Viktor V.} and Kim, {Duck Young} and Elissaios Stavrou and Takaki Muramatsu and Mao, {Ho Kwang} and Pickard, {Chris J.} and Needs, {Richard J.} and Prakapenka, {Vitali B.} and Goncharov, {Alexander F.}",

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month = jul,

day = "28",

doi = "10.1038/ncomms12267",

language = "英语",

volume = "7",

journal = "Nature Communications",

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TY - JOUR

T1 - Synthesis of sodium polyhydrides at high pressures

AU - Struzhkin, Viktor V.

AU - Kim, Duck Young

AU - Stavrou, Elissaios

AU - Muramatsu, Takaki

AU - Mao, Ho Kwang

AU - Pickard, Chris J.

AU - Needs, Richard J.

AU - Prakapenka, Vitali B.

AU - Goncharov, Alexander F.

PY - 2016/7/28

Y1 - 2016/7/28

N2 - The only known compound of sodium and hydrogen is archetypal ionic NaH. Application of high pressure is known to promote states with higher atomic coordination, but extensive searches for polyhydrides with unusual stoichiometry have had only limited success in spite of several theoretical predictions. Here we report the first observation of the formation of polyhydrides of Na (NaH 3 and NaH 7) above 40 GPa and 2,000 K. We combine synchrotron X-ray diffraction and Raman spectroscopy in a laser-heated diamond anvil cell and theoretical random structure searching, which both agree on the stable structures and compositions. Our results support the formation of multicenter bonding in a material with unusual stoichiometry. These results are applicable to the design of new energetic solids and high-Temperature superconductors based on hydrogen-rich materials.

AB - The only known compound of sodium and hydrogen is archetypal ionic NaH. Application of high pressure is known to promote states with higher atomic coordination, but extensive searches for polyhydrides with unusual stoichiometry have had only limited success in spite of several theoretical predictions. Here we report the first observation of the formation of polyhydrides of Na (NaH 3 and NaH 7) above 40 GPa and 2,000 K. We combine synchrotron X-ray diffraction and Raman spectroscopy in a laser-heated diamond anvil cell and theoretical random structure searching, which both agree on the stable structures and compositions. Our results support the formation of multicenter bonding in a material with unusual stoichiometry. These results are applicable to the design of new energetic solids and high-Temperature superconductors based on hydrogen-rich materials.

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U2 - 10.1038/ncomms12267

DO - 10.1038/ncomms12267

M3 - 文章

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VL - 7

JO - Nature Communications

JF - Nature Communications

M1 - 12267

ER -

Synthesis of sodium polyhydrides at high pressures

Abstract

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