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High-pressure optical spectroscopy and X-ray diffraction studies on synthetic cobalt aluminum silicate garnet

  • Michail N. Taran EMAIL logo , Fabrizio Nestola , Haruo Ohashi , Monika Koch-Müller , Tonci Balic-Zunic and Lars Arnskov Olsen
Published/Copyright: April 1, 2015
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American Mineralogist
From the journal American Mineralogist Volume 92 Issue 10

Abstract

The pressure-induced behavior of spin-allowed dd-bands of VIIICo2+ in the absorption spectra of synthetic Co3Al2Si3O12 garnet was studied from 10-4 to 13 GPa. The plots of the peak energy vs. pressure for the three sharpest well resolved bands at ca. 5160, 17 680, and 18 740 cm-1 display small but discernible breaks in linear relations between 4 and 5 GPa. Data from single-crystal X-ray diffraction likewise show discontinuities in trends of CoO8 polyhedral volume and distortion, and Co-O and Si-O bond distances over this pressure range. These effects are related to a pressure-induced phase transition from the β- to α-isostructural polymorph of Co3Al2Si3O12.

Keywords: High-pressure optical spectroscopy; high-pressure X-ray diffraction; cobalt-bearing garnet; phase transitions
Received: 2006-9-21
Accepted: 2007-6-3
Published Online: 2015-4-1
Published in Print: 2007-10-1

© 2015 by Walter de Gruyter Berlin/Boston

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  3. A monazite oxygen isotope thermometer
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  24. Letter: Meridianiite: A new mineral species observed on Earth and predicted to exist on Mars
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  26. Letter: Hydrogen-carbonate ion in synthetic high-pressure apatite
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https://doi.org/10.2138/am.2007.2457
Keywords for this article
High-pressure optical spectroscopy; high-pressure X-ray diffraction; cobalt-bearing garnet; phase transitions

Articles in the same Issue

  1. Ferric iron in Al-bearing akimotoite coexisting with iron-nickel metal in a shock-melt vein in an L-6 chondrite
  2. Solidification and microstructures of binary ice-I/hydrate eutectic aggregates
  3. A monazite oxygen isotope thermometer
  4. The albite fusion curve re-examined: New experiments and the high-pressure density and compressibility of high albite and NaAlSi3O8 liquid
  5. XRD and HRTEM analyses of stacking structures in sudoite, di-trioctahedral chlorite
  6. Vibrational dynamics in H+-substituted forsterite: A first-principles molecular dynamics study
  7. Fluorophlogopite from Biancavilla (Mt. Etna, Sicily, Italy): Crystal structure and crystal chemistry of a new F-dominant analog of phlogopite
  8. Pressure-induced over-hydration of thomsonite: A synchrotron powder diffraction study
  9. High-pressure optical spectroscopy and X-ray diffraction studies on synthetic cobalt aluminum silicate garnet
  10. In situ observation of the decomposition of kyanite at high pressures and high temperatures
  11. Mineralogy and crystal structure of bouazzerite from Bou Azzer, Anti-Atlas, Morocco: Bi-As-Fe nanoclusters containing Fe3+ in trigonal prismatic coordination
  12. Single-crystal structure refinement of diaspore at 50 GPa
  13. FTIR spectroscopy of Ti-rich pargasites from Lherz and the detection of O2- at the anionic O3 site in amphiboles
  14. The relative stability of monazite and huttonite at 300 - 900 °C and 200 - 1000 MPa: Metasomatism and the propagation of metastable mineral phases
  15. Acoustic dissipation associated with phase transitions in lawsonite, CaAl2Si2O7(OH)2·H2O
  16. Magnetic anisotropy of carbonate minerals at room temperature and 77 K
  17. Non-ideality and defectivity of the åkermanite-gehlenite solid solution: An X-ray diffraction and TEM study
  18. The system Al2O3-P2O5-H2O at temperatures below 200 °C: Experimental data on the stability of variscite and metavariscite AlPO4·2H2O
  19. Low-pressure decomposition of chrysotile as a function of time and temperature
  20. Ion exchange equilibrium and structural changes in clinoptilolite irradiated with β- and γ-radiation: Monovalent cations
  21. Investigation of dioctahedral smectite hydration properties by modeling of X-ray diffraction profiles: Influence of layer charge and charge location
  22. Growth of large (1 mm) MgSiO3 perovskite single crystals: A thermal gradient method at ultrahigh pressure
  23. Carbon is not required during crystallization to produce ferrobasalts/ferrodiorites (FTP rocks)
  24. Letter: Meridianiite: A new mineral species observed on Earth and predicted to exist on Mars
  25. Letter: Equations of state of CaIrO3 perovskite and post-perovskite phases
  26. Letter: Hydrogen-carbonate ion in synthetic high-pressure apatite
  27. Letter: Effects of irradiation damage on the back-scattering of electrons: Silicon-implanted silicon
  28. Letter: High-precision oxygen isotope analysis of picogram samples reveals 2 μm gradients and slow diffusion in zircon
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