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@ARTICLE{Chen:632064,
      author       = {Chen, Huawei and Bykov, Maxim and Batyrev, Iskander G. and
                      Brüning, Lukas and Bykova, Elena and Mahmood, Mohammad F.
                      and Chariton, Stella and Prakapenka, Vitali B. and
                      Fedotenko, Timofey and Glazyrin, Konstantin and Mezouar,
                      Mohamed and Garbarino, Gaston and Steele, Andrew and
                      Goncharov, Alexander F.},
      title        = {{S}ynthesis and {S}tability of {H}igh-{E}nergy-{D}ensity
                      {N}iobium {N}itrides under {H}igh-{P}ressure {C}onditions},
      journal      = {Inorganic chemistry},
      volume       = {64},
      number       = {1},
      issn         = {0020-1669},
      address      = {Washington, DC},
      publisher    = {American Chemical Society},
      reportid     = {PUBDB-2025-02097},
      pages        = {692 - 700},
      year         = {2025},
      abstract     = {High-energy-density materials (HEDMs) are crucial in
                      various applications, from energy storage to defense
                      technologies. Transition metal polynitrides are promising
                      candidates for HEDMs. Using single-crystal synchrotron X-ray
                      diffraction, we investigated the crystal structures of
                      niobium nitride, specifically Nb$_2$N$_3$ and NbN$_2$, under
                      high-pressure conditions of up to 86 GPa. At higher
                      pressures, niobium polynitrides NbN$_4$ and NbN$_5$ were
                      observed to be stable from 100 to 120 GPa, which feature
                      low-order nitrogen bonding. The low-order bonded nitrogen in
                      NbN$_4$ and NbN5 forms multiple polynitrogen anions at
                      megabar pressure ranges. In the Nb–N system, we observed
                      an increasing coordination number of metal–nitrogen as
                      pressure increased. These structures were supported by
                      density functional theory (DFT) calculations and Raman
                      spectroscopy.},
      cin          = {FS DOOR-User / FS-PET-D},
      ddc          = {540},
      cid          = {$I:(DE-H253)FS_DOOR-User-20241023$ /
                      I:(DE-H253)FS-PET-D-20190712},
      pnm          = {631 - Matter – Dynamics, Mechanisms and Control
                      (POF4-631) / 6G3 - PETRA III (DESY) (POF4-6G3) / HIPMAT -
                      High-pressure nitride materials: towards the controllable
                      and scalable synthesis in a diamond anvil cell (101077963) /
                      FS-Proposal: I-20230233 (I-20230233)},
      pid          = {G:(DE-HGF)POF4-631 / G:(DE-HGF)POF4-6G3 /
                      G:(EU-Grant)101077963 / G:(DE-H253)I-20230233},
      experiment   = {EXP:(DE-H253)P-P02.2-20150101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:39707975},
      doi          = {10.1021/acs.inorgchem.4c03331},
      url          = {https://bib-pubdb1.desy.de/record/632064},
}