Startseite Naturwissenschaften Order parameter behavior at the structural phase transition in cummingtonite from Mössbauer spectroscopy
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Order parameter behavior at the structural phase transition in cummingtonite from Mössbauer spectroscopy

  • Tiziana Boffa Ballaran EMAIL logo , Catherine A. Mccammon und Michael A. Carpenter
Veröffentlicht/Copyright: 28. März 2015
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American Mineralogist
Aus der Zeitschrift American Mineralogist Band 87 Heft 10

Abstract

The microscopic behavior of the C2/m ↔ P21/m phase transition occurring in cummingtonite (36 mol% Fe) as a function of temperature has been investigated using Mössbauer spectroscopy performed in the temperature range 100-550 K. The quadrupole splitting (△EQ) of the M4 doublet shows a change in slope at the critical temperature of the phase transition. The difference between △EQ of the low-symmetry phase and the values obtained at the same temperatures by extrapolating △EQ of the C2/m phase has been used as a measure proportional to the local order parameter associated with the phase transition. The Mössbauer data, which provide a measure of the local microscopic order parameter, scale in an identical manner to the macroscopic properties, indicating that the sub-unit scale structure of cummingtonite evolves in a parallel manner with the macroscopic average structure on a much longer length scale.

Received: 2001-11-19
Accepted: 2002-6-28
Published Online: 2015-3-28
Published in Print: 2002-10-1

© 2015 by Walter de Gruyter Berlin/Boston

Artikel in diesem Heft

  1. Atomic-scale observations of franckeite surface morphology
  2. Surface control vs. diffusion control during calcite dissolution: Dependence of step-edge velocity upon solution pH
  3. First-principles calculation of the infrared spectrum of lizardite
  4. Hard-mode infrared spectroscopy of perovskites across the CaTiO3-SrTiO3 solid solution
  5. Spectroscopic studies of spessartine from Brazilian pegmatites
  6. Order/disorder in natrolite group zeolites: A 29Si and 27Al MAS NMR study
  7. Evolution of local electronic structure in alabandite and niningerite solid solutions [(Mn,Fe)S, (Mg,Mn)S, (Mg,Fe)S] using sulfur K- and L-edge XANES spectroscopy
  8. Electron paramagnetic resonance spectroscopic study of synthetic fluorapatite: Part III. Structural characterization of sub-ppm-level Gd and Mn in minerals at W-band frequency
  9. Experimental determination of the equilibria: rutile + magnesite = geikielite + CO2 and zircon + 2 magnesite = baddeleyite + forsterite + 2 CO2
  10. Symplectites derived from metastable phases in martian basaltic meteorites
  11. Copper speciation in vapor-phase fluid inclusions from the Mole Granite, Australia
  12. Trace-element partitioning between vacancy-rich eclogitic clinopyroxene and silicate melt
  13. Fluorite particles inducing butterfly aggregates of incipient microperthite in alkali feldspar from a syenite, the Patagonian Andes, southern Chile
  14. Thermal stability and spectroscopic studies of zemkorite: A carbonate from the Venkatampalle kimberlite of southern India
  15. Temperatures from triple-junction angles in sulfides
  16. Experimental determination of calcite solubility in H2O-NaCl solutions at deep crust/ upper mantle pressures and temperatures: Implications for metasomatic processes in shear zones
  17. Compressibility of stottite, FeGe(OH)6: An octahedral framework with protonated O atoms
  18. High-pressure behavior of bikitaite: An integrated theoretical and experimental approach
  19. Raman spectroscopic study of H2O in bikitaite: “One-dimensional ice”
  20. Hydrogen, lithium, and boron in mantle-derived olivine: The role of coupled substitutions
  21. Crystal chemistry of three tourmalines by SREF, EMPA, and SIMS
  22. Revised structure models for antigorite: An HRTEM study
  23. The structure of Mn-rich tuperssuatsiaite: A palygorskite-related mineral
  24. Single-crystal structure refinements and crystal chemistry of synthetic trioctahedral micas KM3(Al3+,Si4+)4O10(OH)2, where M = Ni2+, Mg2+, Co2+, Fe2+, or Al3+
  25. SIMS matrix effects in the analysis of light elements in silicate minerals: Comparison with SREF and EMPA data
  26. Letters. Equation of state of Al-bearing stishovite to 40 GPa at 300 K
  27. Order parameter behavior at the structural phase transition in cummingtonite from Mössbauer spectroscopy
  28. Deciphering Ni sequestration in soil ferromanganese nodules by combining X-ray fluorescence, absorption, and diffraction at micrometer scales of resolution
  29. Use of the spindle stage for orientation of single crystals for microXAS: Isotropy and anisotropy in Fe-XANES spectra
  30. A technique for mounting and polishing melt inclusions in small (<1 mm) crystals
https://doi.org/10.2138/am-2002-1027

Artikel in diesem Heft

  1. Atomic-scale observations of franckeite surface morphology
  2. Surface control vs. diffusion control during calcite dissolution: Dependence of step-edge velocity upon solution pH
  3. First-principles calculation of the infrared spectrum of lizardite
  4. Hard-mode infrared spectroscopy of perovskites across the CaTiO3-SrTiO3 solid solution
  5. Spectroscopic studies of spessartine from Brazilian pegmatites
  6. Order/disorder in natrolite group zeolites: A 29Si and 27Al MAS NMR study
  7. Evolution of local electronic structure in alabandite and niningerite solid solutions [(Mn,Fe)S, (Mg,Mn)S, (Mg,Fe)S] using sulfur K- and L-edge XANES spectroscopy
  8. Electron paramagnetic resonance spectroscopic study of synthetic fluorapatite: Part III. Structural characterization of sub-ppm-level Gd and Mn in minerals at W-band frequency
  9. Experimental determination of the equilibria: rutile + magnesite = geikielite + CO2 and zircon + 2 magnesite = baddeleyite + forsterite + 2 CO2
  10. Symplectites derived from metastable phases in martian basaltic meteorites
  11. Copper speciation in vapor-phase fluid inclusions from the Mole Granite, Australia
  12. Trace-element partitioning between vacancy-rich eclogitic clinopyroxene and silicate melt
  13. Fluorite particles inducing butterfly aggregates of incipient microperthite in alkali feldspar from a syenite, the Patagonian Andes, southern Chile
  14. Thermal stability and spectroscopic studies of zemkorite: A carbonate from the Venkatampalle kimberlite of southern India
  15. Temperatures from triple-junction angles in sulfides
  16. Experimental determination of calcite solubility in H2O-NaCl solutions at deep crust/ upper mantle pressures and temperatures: Implications for metasomatic processes in shear zones
  17. Compressibility of stottite, FeGe(OH)6: An octahedral framework with protonated O atoms
  18. High-pressure behavior of bikitaite: An integrated theoretical and experimental approach
  19. Raman spectroscopic study of H2O in bikitaite: “One-dimensional ice”
  20. Hydrogen, lithium, and boron in mantle-derived olivine: The role of coupled substitutions
  21. Crystal chemistry of three tourmalines by SREF, EMPA, and SIMS
  22. Revised structure models for antigorite: An HRTEM study
  23. The structure of Mn-rich tuperssuatsiaite: A palygorskite-related mineral
  24. Single-crystal structure refinements and crystal chemistry of synthetic trioctahedral micas KM3(Al3+,Si4+)4O10(OH)2, where M = Ni2+, Mg2+, Co2+, Fe2+, or Al3+
  25. SIMS matrix effects in the analysis of light elements in silicate minerals: Comparison with SREF and EMPA data
  26. Letters. Equation of state of Al-bearing stishovite to 40 GPa at 300 K
  27. Order parameter behavior at the structural phase transition in cummingtonite from Mössbauer spectroscopy
  28. Deciphering Ni sequestration in soil ferromanganese nodules by combining X-ray fluorescence, absorption, and diffraction at micrometer scales of resolution
  29. Use of the spindle stage for orientation of single crystals for microXAS: Isotropy and anisotropy in Fe-XANES spectra
  30. A technique for mounting and polishing melt inclusions in small (<1 mm) crystals
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