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Twinned caesium cerium(IV) penta-fluoride.

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Single-crystals of cesium cerium pentafluoride (CsCeF5) were hydro-thermally synthesized. This material undergoes an irreversible phase transition when subjected to compression, indicating its potential for novel applications.

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Area of Science:

  • Solid-state chemistry
  • Crystallography
  • Materials science

Background:

  • Cesium cerium pentafluoride (CsCeF5) is a fluoride compound with potential applications in materials science.
  • Understanding its crystal structure and behavior under pressure is crucial for exploring its properties.

Purpose of the Study:

  • To synthesize single-crystals of CsCeF5 using hydrothermal methods.
  • To characterize the crystal structure and investigate its response to external pressure.

Main Methods:

  • Hydrothermal synthesis of CsCeF5 single-crystals.
  • X-ray diffraction analysis to determine crystal structure and twinning.
  • Compression studies to identify phase transitions.

Main Results:

  • Single-crystals of CsCeF5 were successfully synthesized.
  • The crystal structure features layers of distorted CeF8 square-anti-prisms with Cs+ cations in between.
  • An irreversible phase transition was observed upon compression at approximately 1 GPa.

Conclusions:

  • The study provides a detailed structural characterization of CsCeF5.
  • The observed phase transition under pressure suggests CsCeF5 as a candidate for high-pressure materials research.