Angewandte Chemie - International Edition, volume 57, issue 3, pages 688-692

Synthesis and Stability of Lanthanum Superhydrides.

Geballe Z. M. ¹

Liu Hanyu ¹

Mishra Ajay Kumar ^{1, 2}

Ahart M. ¹

Somayazulu M. ¹

Meng Yue ³

Baldini Maria ¹

Hemley R. J. ⁴

Hide authors affiliations Show authors affiliations: 4 affiliations

Geophysical Laboratory Carnegie Institution of Washington Washington DC 20015 USA |

Permanent address: HP&SRPD Bhabha Atomic Research Center Mumbai-85 India |

HPCAT Geophysical Laboratory Carnegie Institution of Washington Argonne IL 60439 USA |

⁴

Institute of Materials Science and Department of Civil and Environmental Engineering The George Washington University Washington DC 20052 USA |

Publication type: Journal Article

Publication date: 2017-12-15

Wiley

Journal: Angewandte Chemie - International Edition

Quartile SCImago

Quartile WOS

Impact factor: 16.6

ISSN: 14337851, 15213773

DOI: 10.1002/anie.201709970

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General Chemistry

Catalysis

Abstract

Recent theoretical calculations predict that megabar pressure stabilizes very hydrogen-rich simple compounds having new clathrate-like structures and remarkable electronic properties including room-temperature superconductivity. X-ray diffraction and optical studies demonstrate that superhydrides of lanthanum can be synthesized with La atoms in an fcc lattice at 170 GPa upon heating to about 1000 K. The results match the predicted cubic metallic phase of LaH10 having cages of thirty-two hydrogen atoms surrounding each La atom. Upon decompression, the fcc-based structure undergoes a rhombohedral distortion of the La sublattice. The superhydride phases consist of an atomic hydrogen sublattice with H-H distances of about 1.1 Å, which are close to predictions for solid atomic metallic hydrogen at these pressures. With stability below 200 GPa, the superhydride is thus the closest analogue to solid atomic metallic hydrogen yet to be synthesized and characterized.

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Geballe Z. M. et al. Synthesis and Stability of Lanthanum Superhydrides. // Angewandte Chemie - International Edition. 2017. Vol. 57. No. 3. pp. 688-692.

GOST all authors (up to 50) Copy

Geballe Z. M., Liu H., Mishra A. K., Ahart M., Somayazulu M., Meng Y., Baldini M., Hemley R. J. Synthesis and Stability of Lanthanum Superhydrides. // Angewandte Chemie - International Edition. 2017. Vol. 57. No. 3. pp. 688-692.

RIS |

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RIS Copy

TY - JOUR

DO - 10.1002/anie.201709970

UR - https://doi.org/10.1002%2Fanie.201709970

TI - Synthesis and Stability of Lanthanum Superhydrides.

T2 - Angewandte Chemie - International Edition

AU - Ahart, M.

AU - Meng, Yue

AU - Baldini, Maria

AU - Geballe, Z. M.

AU - Liu, Hanyu

AU - Mishra, Ajay Kumar

AU - Somayazulu, M.

AU - Hemley, R. J.

PY - 2017

DA - 2017/12/15 00:00:00

PB - Wiley

SP - 688-692

IS - 3

VL - 57

SN - 1433-7851

SN - 1521-3773

ER -

BibTex |

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BibTex Copy

@article{2017_Geballe,

author = {M. Ahart and Yue Meng and Maria Baldini and Z. M. Geballe and Hanyu Liu and Ajay Kumar Mishra and M. Somayazulu and R. J. Hemley},

title = {Synthesis and Stability of Lanthanum Superhydrides.},

journal = {Angewandte Chemie - International Edition},

year = {2017},

volume = {57},

publisher = {Wiley},

month = {dec},

url = {https://doi.org/10.1002%2Fanie.201709970},

number = {3},

pages = {688--692},

doi = {10.1002/anie.201709970}

}

MLA

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Geballe, Z. M., et al. “Synthesis and Stability of Lanthanum Superhydrides..” Angewandte Chemie - International Edition, vol. 57, no. 3, Dec. 2017, pp. 688-692. https://doi.org/10.1002%2Fanie.201709970.

Found error?

Publisher

Wiley

Journal

Angewandte Chemie - International Edition

Quartile SCImago

Quartile WOS

Impact factor

16.6

ISSN

14337851 (Print)
15213773 (Electronic)