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Powder diffraction and Raman spectroscopic study of lawsonite at high water pressure

  • Proceedings of the International Symposium “Order, Disorder, and Properties of Oxides” (ODPO-11)
  • Published:
Bulletin of the Russian Academy of Sciences: Physics Aims and scope

Abstract

The structural behavior of natural lawsonite CaAl2Si2O7(OH)2 · H2O in aqueous and nonaqueous media (pressure up to 9.5 GPa) has been studied by synchrotron powder diffraction and Raman spectroscopy. The volume compressibility of lawsonite is found to be similar in both aqueous and nonaqueous media, while irreversible amorphization is observed only under compression in the aqueous medium to a pressure of about 6 GPa. Along with the observed increase in framework vibration frequencies, this reveals that the lawsonite structure is unstable when hydrostatic conditions of compression differ from those provided by crystallization of ice VII in an aqueous medium.

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Authors and Affiliations

  1. Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

    A. Yu. Likhacheva, S. V. Goryainov & I. A. Madyukov

  2. Molecular Design and Environmentally Safe Technologies Research and Education Center MDEST REC-008, Novosibirsk State University, Novosibirsk, 630090, Russia

    S. V. Goryainov & I. A. Madyukov

  3. Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

    A. Yu. Manakov

  4. Institute of Solid State Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

    A. I. Ancharov

  5. Siberian Synchrotron Radiation Centre, Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

    A. I. Ancharov

Authors
  1. A. Yu. Likhacheva
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  2. S. V. Goryainov
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  3. I. A. Madyukov
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  4. A. Yu. Manakov
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  5. A. I. Ancharov
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Corresponding author

Correspondence to A. Yu. Likhacheva.

Additional information

Original Russian Text © A.Yu. Likhacheva, S.V. Goryainov, I.A. Madyukov, A.Yu. Manakov, A.I. Ancharov, 2009, published in Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2009, Vol. 73, No. 8, pp. 1205–1207.

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Likhacheva, A.Y., Goryainov, S.V., Madyukov, I.A. et al. Powder diffraction and Raman spectroscopic study of lawsonite at high water pressure. Bull. Russ. Acad. Sci. Phys. 73, 1143–1146 (2009). https://doi.org/10.3103/S1062873809080371

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  • DOI: https://doi.org/10.3103/S1062873809080371

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