Article
Licensed
Unlicensed Requires Authentication

High-pressure phase relation of MnSiO3 up to 85 GPa: Existence of MnSiO3 perovskite

  • EMAIL logo , , , , and
Published/Copyright: April 1, 2015
Become an author with De Gruyter Brill
Author Information
American Mineralogist
From the journal American Mineralogist Volume 93 Issue 4

Abstract

The high-pressure phase relation of MnSiO3 was examined up to 85 GPa and 2600 K using a laserheated diamond-anvil cell combined with synchrotron radiation. MnSiO3 garnet decomposes into a mixture of MnO with a rock-salt structure (B1) + SiO2 stishovite at pressures higher than ~20 GPa and temperatures higher than ~1200 K. However, MnO (B1) + SiO2 stishovite further transforms to a perovskite structure with increasing pressure. The phase boundary between these structures is positive in the pressure-temperature diagram. The triple point of garnet, MnO + SiO2 and perovskite in the pressure-temperature diagram is ~20 GPa and 1200 K. MnSiO3 perovskite is orthorhombic, and consistent with space group Pbnm, both at high pressure and high temperature and at high pressure and room temperature, but becomes amorphous during decompression. The refined cell parameters of MnSiO3 perovskite at 85 GPa and 2600 K are a = 4.616(2) Å, b = 4.653(2) Å, c = 6.574(3) Å, and V = 141.2(2) Å3. The a/b ratio increases (approaches 1) with pressure and temperature, while the √2a/c ratio remains nearly constant (<1). This indicates that the orthorhombic distortion decreases and the structure tends toward a tetragonal perovskite with increasing pressure and temperature.

Keywords: MnSiO3 perovskite; MnSiO3 garnet; MnO with a rock-salt structure; laser-heated diamond anvil cell
Received: 2007-3-21
Accepted: 2007-12-7
Published Online: 2015-4-1
Published in Print: 2008-4-1

© 2015 by Walter de Gruyter Berlin/Boston

Articles in the same Issue

  1. Compositional variability and crystal structural features of guanacoite
  2. Interferometric study of pyrite surface reactivity in acidic conditions
  3. White mica domain formation: A model for paragonite, margarite, and muscovite formation during prograde metamorphism
  4. High-pressure phase transitions in MgSiO3 orthoenstatite studied by atomistic computer simulation
  5. Time-resolved synchrotron powder X-ray diffraction study of magnetite formation by the Fe(III)-reducing bacterium Geobacter sulfurreducens
  6. Low-temperature calorimetric and magnetic data for natural end-members of the axinite group
  7. Temperature derivatives of elastic wave velocities in plagioclase (An51±1) above and below the order-disorder transition temperature
  8. Disordered silica with tridymite-like structure in the Twiggs clay
  9. Crystal structures of synthetic melanotekite (Pb2Fe2Si2O9), kentrolite (Pb2Mn2Si2O9), and the aluminum analogue (Pb2Al2Si2O9)
  10. Structure and reactivity of synthetic Co-substituted goethites
  11. The crystal chemistry of Fe-bearing sphalerites: An infrared spectroscopic study
  12. Effects of hydration on the structure and compressibility of wadsleyite, β-(Mg2SiO4)
  13. Metastability of sillimanite relative to corundum and quartz in the kyanite stability field: Competition between stable and metastable reactions
  14. Diffusion, discontinuous precipitation, metamorphism, and metasomatism: The complex history of South African upper-mantle symplectites
  15. Thermal behavior of a Ti-rich phlogopite from Mt. Vulture (Potenza, Italy): An in situ X-ray single-crystal diffraction study
  16. The high-pressure behavior of an Al- and Fe-rich natural orthopyroxene
  17. High-pressure phase relation of MnSiO3 up to 85 GPa: Existence of MnSiO3 perovskite
  18. Linking Mössbauer and structural parameters in elbaite-schorl-dravite tourmalines
  19. Synchrotron powder X-ray diffraction study of the structure and dehydration behavior of palygorskite
  20. Maskelynite-hosted apatite in the Chassigny meteorite: Insights into late-stage magmatic volatile evolution in martian magmas
  21. Eskolaite associated with diamond from the Udachnaya kimberlite pipe, Yakutia, Russia
  22. Lakebogaite, CaNaFe23+H(UO2)2(PO4)4(OH)2(H2O)8, a new uranyl phosphate with a unique crystal structure from Victoria, Australia
  23. Letter. Crystal structure and Raman spectrum of hydroxyl-bästnasite-(Ce), CeCO3(OH)
https://doi.org/10.2138/am.2008.2645
Keywords for this article
MnSiO3 perovskite; MnSiO3 garnet; MnO with a rock-salt structure; laser-heated diamond anvil cell

Articles in the same Issue

  1. Compositional variability and crystal structural features of guanacoite
  2. Interferometric study of pyrite surface reactivity in acidic conditions
  3. White mica domain formation: A model for paragonite, margarite, and muscovite formation during prograde metamorphism
  4. High-pressure phase transitions in MgSiO3 orthoenstatite studied by atomistic computer simulation
  5. Time-resolved synchrotron powder X-ray diffraction study of magnetite formation by the Fe(III)-reducing bacterium Geobacter sulfurreducens
  6. Low-temperature calorimetric and magnetic data for natural end-members of the axinite group
  7. Temperature derivatives of elastic wave velocities in plagioclase (An51±1) above and below the order-disorder transition temperature
  8. Disordered silica with tridymite-like structure in the Twiggs clay
  9. Crystal structures of synthetic melanotekite (Pb2Fe2Si2O9), kentrolite (Pb2Mn2Si2O9), and the aluminum analogue (Pb2Al2Si2O9)
  10. Structure and reactivity of synthetic Co-substituted goethites
  11. The crystal chemistry of Fe-bearing sphalerites: An infrared spectroscopic study
  12. Effects of hydration on the structure and compressibility of wadsleyite, β-(Mg2SiO4)
  13. Metastability of sillimanite relative to corundum and quartz in the kyanite stability field: Competition between stable and metastable reactions
  14. Diffusion, discontinuous precipitation, metamorphism, and metasomatism: The complex history of South African upper-mantle symplectites
  15. Thermal behavior of a Ti-rich phlogopite from Mt. Vulture (Potenza, Italy): An in situ X-ray single-crystal diffraction study
  16. The high-pressure behavior of an Al- and Fe-rich natural orthopyroxene
  17. High-pressure phase relation of MnSiO3 up to 85 GPa: Existence of MnSiO3 perovskite
  18. Linking Mössbauer and structural parameters in elbaite-schorl-dravite tourmalines
  19. Synchrotron powder X-ray diffraction study of the structure and dehydration behavior of palygorskite
  20. Maskelynite-hosted apatite in the Chassigny meteorite: Insights into late-stage magmatic volatile evolution in martian magmas
  21. Eskolaite associated with diamond from the Udachnaya kimberlite pipe, Yakutia, Russia
  22. Lakebogaite, CaNaFe23+H(UO2)2(PO4)4(OH)2(H2O)8, a new uranyl phosphate with a unique crystal structure from Victoria, Australia
  23. Letter. Crystal structure and Raman spectrum of hydroxyl-bästnasite-(Ce), CeCO3(OH)
Downloaded on 13.4.2026 from https://www.degruyterbrill.com/document/doi/10.2138/am.2008.2645/html
Scroll to top button