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@ARTICLE{Farla:616759,
      author       = {Farla, Robert and Neri, Adrien and Poeppelbaum, Melanie and
                      Glazyrin, Konstantin},
      title        = {{T}hermal {E}quations of {S}tate of {B}2-structured
                      {R}ubidium {H}alides {R}b{C}l, {R}b{B}r and {R}b{I}},
      journal      = {Journal of applied physics},
      volume       = {137},
      number       = {11},
      issn         = {0021-8979},
      address      = {Melville, NY},
      publisher    = {American Inst. of Physics},
      reportid     = {PUBDB-2024-06513},
      pages        = {115901},
      year         = {2025},
      note         = {The beamline LVP instrument Aster-15 is funded by the
                      ErUM-Pro program (Grant Nos. 05K16WC2 and 05K13WC2) of the
                      German Federal Ministry of Education and Research (BMBF)},
      abstract     = {In this study, we determined the thermal equations of state
                      (EoS) for rubidium chloride (RbCl), rubidium bromide (RbBr),
                      and rubidium iodide (RbI) in the B2 (CsCl-type) structure.
                      We conducted in situ energy-dispersive X-ray diffraction
                      measurements at high pressures (up to 26 GPa) and
                      temperatures (up to 1800 K) using a Large Volume Press
                      (LVP). Pressures were calibrated using CsCl, Mo, and Pt in
                      the same cell assemblies. For each B2-structured Rb halide,
                      the parameter V$_0$ (unit cell volume at room pressure) was
                      estimated from additional diamond anvil cell (DAC)
                      experiments at 300 K. Using the third-order Birch-Murnaghan
                      equation and the Mie-Grüneisen-Debye thermal model, we
                      derived the thermoelastic parameters for each phase: RbCl:
                      K0 = 19.89(8) GPa, K$_0$’ = 5.00(2), γ$_0$ = 1.96(4), q =
                      1.05(9), RbBr: K$_0$ = 16.28(4) GPa, K$_0$’ = 5.28(2),
                      γ$_0$ = 2.18(14), q = 1.52(24), RbI: K$_0$ = 13.69(4) GPa,
                      K$_0$’ = 4.95(1), γ$_0$ = 2.21(7), q = 1.42(10). These
                      parameters represent the isothermal bulk modulus (K$_0$),
                      its pressure derivative (K$_0$’), the Grüneisen parameter
                      (γ$_0$) and the logarithmic volume dependence of the
                      Grüneisen parameter (q). The newly derived EoS for rubidium
                      halides provide effective pressure markers above 0.5 GPa, as
                      they remain stable across wide pressure and temperature
                      ranges. Additionally, RbCl and RbBr offer improved X-ray
                      transmission compared to CsCl. These EoS can be combined
                      with a secondary metallic phase to estimate pressure and
                      temperature in the absence of a thermocouple, taking
                      advantage of the large differences in thermal expansion
                      between halides and metals.},
      cin          = {FS-PETRA-D / FS DOOR-User},
      ddc          = {530},
      cid          = {I:(DE-H253)FS-PETRA-D-20210408 /
                      $I:(DE-H253)FS_DOOR-User-20241023$},
      pnm          = {631 - Matter – Dynamics, Mechanisms and Control
                      (POF4-631) / 6G3 - PETRA III (DESY) (POF4-6G3) /
                      FS-Proposal: I-20220794 (I-20220794)},
      pid          = {G:(DE-HGF)POF4-631 / G:(DE-HGF)POF4-6G3 /
                      G:(DE-H253)I-20220794},
      experiment   = {EXP:(DE-H253)P-P61.2-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001447588200015},
      doi          = {10.1063/5.0248905},
      url          = {https://bib-pubdb1.desy.de/record/616759},
}