AI Article Synopsis

  • Single crystals of AMF (where A is Rb or Cs and M is Al or Ga) were grown using mixed alkali chloride/fluoride fluxes in sealed silver tubes.
  • Cs-containing compounds (CsAlF and CsGaF) showed two different forms (polymorphs) at room temperature, while Rb-containing compounds (RbAlF and RbGaF) only exhibited one form each.
  • High-temperature studies using TGA/DSC and SCXRD/PXRD revealed that all four compounds transitioned to the same cubic structure type when heated.

Article Abstract

Single crystals of AMF (A = Rb, Cs; M = Al, Ga) were grown from mixed alkali chloride/fluoride fluxes in sealed silver tubes. For CsAlF and CsGaF, two polymorphs were observed at room temperature: -CsMF and -CsMF. For the two Rb containing compositions, only one room temperature polymorph was observed: -RbAlF and -RbGaF, respectively. Simultaneous TGA/DSC and high temperature SCXRD/PXRD were used to study the high temperature behavior of AMF. The compounds of all four compositions were found to undergo structure transitions upon heating to the same cubic structure type, -AMF.

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http://dx.doi.org/10.1039/d3dt00352cDOI Listing

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