High-pressure structural study of MnF2
- Carnegie Institute of Washington, Washington, DC (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Univ. of Saskatchewan, Saskatoon, SK (Canada); Canadian Light Sources, Inc., Saskatoon, SK (Canada)
- Carnegie Institute of Washington, Washington, DC (United States); Chinese Academy of Sciences (CAS), Hefei (China)
- Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
- National Technical Univ. of Athens, Athens (Greece)
In this study, manganese fluoride (MnF2) with the tetragonal rutile-type structure has been studied using a synchrotron angle-dispersive powder x-ray diffraction and Raman spectroscopy in a diamond anvil cell up to 60 GPa at room temperature combined with first-principles density functional calculations. The experimental data reveal two pressure-induced structural phase transitions with the following sequence: rutile → SrI2 type (3 GPa)→ α–PbCl2 type (13 GPa). Complete structural information, including interatomic distances, has been determined in the case of MnF2 including the exact structure of the debated first high-pressure phase. First-principles density functional calculations confirm this phase transition sequence, and the two calculated transition pressures are in excellent agreement with the experiment. Lattice dynamics calculations also reproduce the experimental Raman spectra measured for the ambient and high-pressure phases. The results are discussed in line with the possible practical use of rutile-type fluorides in general and specifically MnF2 as a model compound to reveal the HP structural behavior of rutile-type SiO2 (Stishovite).
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1248280
- Alternate ID(s):
- OSTI ID: 1236529
- Report Number(s):
- LLNL-JRNL-678301; PRBMDO
- Journal Information:
- Physical Review B, Vol. 93, Issue 5; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Hierarchical Nanostructured MWCNT-MnF 2 Composites With Stable Electrochemical Properties as Cathode Material for Lithium Ion Batteries
|
journal | June 2018 |
The Jahn-Teller Distortion at High Pressure: The Case of Copper Difluoride
|
journal | March 2018 |
Pressure-temperature phase diagram and thermoelastic behavior of manganese fluoride up to 13.1 GPa and 700 K
|
journal | September 2019 |
Similar Records
High-pressure X-ray diffraction, Raman, and computational studies of MgCl2 up to 1 Mbar: Extensive pressure stability of the β-MgCl2 layered structure
Pressure-induced reversible phase transition on Mo2Ga2C