Physics and Chemistry of Minerals

, Volume 46, Issue 10, pp 899–908 | Cite as

3T polytype of an iron-rich oxyphlogopite from the Bartoy volcanic field, Transbaikalia: Mössbauer, infrared, Raman spectroscopy, and crystal structure

  • Nikita V. ChukanovEmail author
  • Sergey M. Aksenov
  • Anatoly V. Kasatkin
  • Radek Škoda
  • Fabrizio Nestola
  • Luca Nodari
  • Anastasia D. Ryanskaya
  • Ramiza K. Rastsvetaeva
Original Paper


The Mössbauer, infrared and Raman spectra of iron-rich oxyphlogopite from a new locality, the Bartoy occurrence, Transbaikalia, Russia were obtained and its crystal structure was solved. The mineral is characterized by the absence of OH groups and ordered distribution of Fe2+ and Fe3+ between sites having octahedral coordination. Unlike oxyphlogopite holotype sample which is monoclinic (1M polytype), iron-rich oxyphlogopite belongs to the 3T polytype (space group P3112) with the unit-cell parameters a = 5.3248(2) Å, c = 29.788(3) Å, V = 731.44(8) Å3. Its refined crystal-chemical formula is (Z = 3): A(K0.9Na0.1) [M1(Fe2+0.6Mg0.4) M2(Fe3+0.4Ti0.4Mg0.2) M3(Mg0.4Fe3+0.3Ti0.2Al0.1)] [T1,2(Si0.7Al0.3)2O5]2X(O0.9F0.1)2.


Oxyphlogopite 3T polytype Crystal structure IR spectroscopy Raman spectroscopy Mössbauer spectroscopy 



This work was financially supported by the Ministry of Science and Higher Education within the State assignment FSRC “Crystallography and Photonics” RAS (single crystal X-ray analysis) and Russian Science Foundation, Grant no. 19-17-00050 (investigation of physical properties).


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Nikita V. Chukanov
    • 1
    • 2
    Email author
  • Sergey M. Aksenov
    • 3
  • Anatoly V. Kasatkin
    • 4
  • Radek Škoda
    • 5
  • Fabrizio Nestola
    • 6
  • Luca Nodari
    • 7
  • Anastasia D. Ryanskaya
    • 8
  • Ramiza K. Rastsvetaeva
    • 3
  1. 1.Institute of Problems of Chemical PhysicsRussian Academy of SciencesChernogolovkaRussia
  2. 2.Faculty of GeologyMoscow State UniversityMoscowRussia
  3. 3.FSRC “Crystallography and Photonics”Russian Academy of SciencesMoscowRussia
  4. 4.Fersman Mineralogical MuseumRussian Academy of SciencesMoscowRussia
  5. 5.Department of Geological Sciences, Faculty of ScienceMasaryk UniversityBrnoCzech Republic
  6. 6.Dipartimento di GeoscienzeUniversità di PadovaPaduaItaly
  7. 7.Institute of Condensed Matter Chemistry and Technology for EnergyCNR-PadovaPaduaItaly
  8. 8.Zavaritsky Institute of Geology and Geochemistry UB RASEkaterinburgRussia

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