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@ARTICLE{Kuzovnikov:637199,
      author       = {Kuzovnikov, Mikhail A. and Wang, Busheng and Wang, Xiaoyu
                      and Marqueño, Tomas and Shuttleworth, Hannah A. and Strain,
                      Calum and Gregoryanz, Eugene and Zurek, Eva and
                      Peña-Alvarez, Miriam and Howie, Ross},
      title        = {{H}igh {P}ressure {S}ynthesis of {R}ubidium
                      {S}uperhydrides},
      journal      = {Physical review letters},
      volume       = {134},
      number       = {19},
      issn         = {0031-9007},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PUBDB-2025-03808},
      pages        = {196102},
      year         = {2025},
      abstract     = {Through laser-heated diamond anvil cell experiments, we
                      synthesize a series of rubidium superhydrides and explore
                      their properties with synchrotron x-ray powder diffraction
                      and Raman spectroscopy measurements, combined with density
                      functional theory calculations. Upon heating rubidium
                      monohydride embedded in H$_2$ at a pressure of 18 GPa, we
                      form RbH$_9$−I, which is stable upon decompression down to
                      8.7 GPa, the lowest stability pressure of any known
                      superhydride. At 22 GPa, another polymorph, RbH$_9$−II is
                      synthesised at high temperature. Unique to the Rb-H system
                      among binary metal hydrides is that further compression does
                      not promote the formation of polyhydrides with higher
                      hydrogen content. Instead, heating above 87 GPa yields
                      RbH$_5$, which exhibits two polymorphs (RbH$_5$−I and
                      RbH$_5$−II). All of the crystal structures comprise a
                      complex network of quasimolecular H$_2$ units and H$^−$
                      anions, with RbH$_5$providing the first experimental
                      evidence of linear H$^−_3$ anions.},
      cin          = {DOOR ; HAS-User / FS DOOR-User},
      ddc          = {530},
      cid          = {I:(DE-H253)HAS-User-20120731 /
                      $I:(DE-H253)FS_DOOR-User-20241023$},
      pnm          = {6G3 - PETRA III (DESY) (POF4-6G3) / MetElOne - The
                      Metallization Conditions of Element One (948895) /
                      FS-Proposal: I-20220830 (I-20220830)},
      pid          = {G:(DE-HGF)POF4-6G3 / G:(EU-Grant)948895 /
                      G:(DE-H253)I-20220830},
      experiment   = {EXP:(DE-H253)P-P02.2-20150101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:40446281},
      doi          = {10.1103/PhysRevLett.134.196102},
      url          = {https://bib-pubdb1.desy.de/record/637199},
}