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@ARTICLE{Storm:637988,
      author       = {Storm, Christian and Racioppi, Stefano and Duff, Matthew
                      and McHardy, James and Zurek, Eva and McMahon, Malcolm},
      title        = {{E}xperimental signatures of interstitial electron density
                      in transparent dense sodium},
      journal      = {Communications materials},
      volume       = {6},
      number       = {1},
      issn         = {2662-4443},
      address      = {London},
      publisher    = {Springer Nature},
      reportid     = {PUBDB-2025-03957},
      pages        = {201},
      year         = {2025},
      note         = {For the purpose of open access, the author has applied a
                      Creative Commons Attribution (CC BY) license to any Author
                      Accepted Manuscript version arising from this submission.},
      abstract     = {The transparent hP4 phase of dense sodium (Na), stable
                      above 200 GPa, has been computed to be an electride in
                      which valence electrons are localised on interstitial
                      lattice sites within the structure. However, there is no
                      experimental evidence for this interstitial electron
                      localisation in Na, or indeed in other high-density
                      electride phases. Using static compression and
                      single-crystal X-ray diffraction techniques, we have grown
                      and studied a single-crystal sample of Na in the hP4 phase
                      at 223 GPa. Using atomic form factors for hP4-Na derived
                      from quantum crystallography techniques, we present
                      experimental results to support the electride nature of this
                      phase.},
      cin          = {DOOR ; HAS-User},
      ddc          = {600},
      cid          = {I:(DE-H253)HAS-User-20120731},
      pnm          = {6G3 - PETRA III (DESY) (POF4-6G3) / FS-Proposal: I-20220638
                      (I-20220638)},
      pid          = {G:(DE-HGF)POF4-6G3 / G:(DE-H253)I-20220638},
      experiment   = {EXP:(DE-H253)P-P02.2-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1038/s43246-025-00925-w},
      url          = {https://bib-pubdb1.desy.de/record/637988},
}