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Electrolytic coloration and spectral properties of natural calcite crystals

  • Hongen Gu EMAIL logo , Rui Zhu , Weiwei Chen , Dongliang Ma , Yang Li and Yutong Li
Published/Copyright: April 2, 2015
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American Mineralogist
From the journal American Mineralogist Volume 96 Issue 8-9

Abstract

Natural colorless calcite crystals are colored electrolytically by using a pointed cathode and a flat anode at various temperatures and voltages. Ca+ and CO3− color centers, Ca2+ vacancies, and CO32- units are produced in colored crystals. Absorption spectral bands of the Ca+ and CO3− color centers, Ca2+ vacancies, and CO32- units are reported for the colored crystals at room temperature. Pb2+ spectral bands are observed in absorption and fluorescence spectra of uncolored and colored crystals. The currenttime curve for electrolytic coloration of natural calcite crystal and its interpretation with respect to the electrolytic coloration process are given. Creation and conversion of color centers are explained.

Keywords : Calcite crystal; electrolytic coloration; color center
Received: 2010-7-7
Accepted: 2011-4-19
Published Online: 2015-4-2
Published in Print: 2011-8-1

© 2015 by Walter de Gruyter Berlin/Boston

Articles in the same Issue

  1. High-pressure Raman spectroscopic studies of ulvöspinel Fe2TiO4
  2. Brearleyite, Ca12Al14O32Cl2, a new alteration mineral from the NWA 1934 meteorite
  3. The 3.65 Å phase in the system MgO-SiO2-H2O: Synthesis, composition, and structure
  4. Water in upper mantle pyroxene megacrysts and xenocrysts: A survey study
  5. Mesoscale twinning and crystallographic registers in biominerals
  6. Radiation effects on cathodoluminescence of albite
  7. Structure refinement of high-pressure hexagonal aluminous phases K1.00Mg2.00Al4.80Si1.15O12 and Na1.04Mg1.88Al4.64Si1.32O12
  8. Elastic softening of metamict titanite CaTiSiO5: Radiation damage and annealing
  9. An experimental study of the diffusion of C and O in calcite in mixed CO2-H2O fluid
  10. Hydrochemical performance and mineralogical evolution of a dispersed alkaline substrate (DAS) remediating the highly polluted acid mine drainage in the full-scale passive treatment of Mina Esperanza (SW Spain)
  11. The effect of fO₂ on the partitioning and valence of V and Cr in garnet/melt pairs and the relation to terrestrial mantle V and Cr content
  12. An experimental study of OH solubility in rutile at 500–900 °C, 0.5–2 GPa, and a range of oxygen fugacities
  13. The growth interval of garnet in the UHP eclogites from the Dabie orogen, China
  14. Structural studies of NH4-exchanged natrolites at ambient conditions and high temperature
  15. Morphology and microstructure of magnetite and ilmenite inclusions in plagioclase from Adirondack anorthositic gneiss
  16. Thermodynamic properties of stishovite by low-temperature heat capacity measurements and the coesite-stishovite transition boundary
  17. Mechanisms of Cr and H incorporation in stishovite determined by single-crystal EPR spectroscopy and DFT calculations
  18. Paramagnetic interactions in the 31P NMR spectroscopy of rare earth element orthophosphate (REPO4, monazite/xenotime) solid solutions
  19. Garnet sector and oscillatory zoning linked with changes in crystal morphology during rapid growth, North Cascades, Washington
  20. Phase stability, elastic behavior, and pressure-induced structural evolution of kalsilite: A ceramic material and high-T/high-P mineral
  21. A new type of high-pressure low-flow metering valve for continuous decompression: First experimental results on degassing of rhyodacitic melts
  22. Substitution mechanisms and implications for the estimate of water fugacity for Ti-rich phlogopite from Mt. Vulture, Potenza, Italy
  23. Calibration for IR measurements of OH in apatite
  24. Electrolytic coloration and spectral properties of natural calcite crystals
  25. Compositional dependent compressibility of dissolved water in silicate glasses
  26. In situ monitoring of lepidocrocite bioreduction and magnetite formation by reflection Mössbauer spectroscopy
  27. Direct determination of europium valence state by XANES in extraterrestrial merrillite: Implications for REE crystal chemistry and martian magmatism
https://doi.org/10.2138/am.2011.3645
Keywords for this article
Calcite crystal; electrolytic coloration; color center

Articles in the same Issue

  1. High-pressure Raman spectroscopic studies of ulvöspinel Fe2TiO4
  2. Brearleyite, Ca12Al14O32Cl2, a new alteration mineral from the NWA 1934 meteorite
  3. The 3.65 Å phase in the system MgO-SiO2-H2O: Synthesis, composition, and structure
  4. Water in upper mantle pyroxene megacrysts and xenocrysts: A survey study
  5. Mesoscale twinning and crystallographic registers in biominerals
  6. Radiation effects on cathodoluminescence of albite
  7. Structure refinement of high-pressure hexagonal aluminous phases K1.00Mg2.00Al4.80Si1.15O12 and Na1.04Mg1.88Al4.64Si1.32O12
  8. Elastic softening of metamict titanite CaTiSiO5: Radiation damage and annealing
  9. An experimental study of the diffusion of C and O in calcite in mixed CO2-H2O fluid
  10. Hydrochemical performance and mineralogical evolution of a dispersed alkaline substrate (DAS) remediating the highly polluted acid mine drainage in the full-scale passive treatment of Mina Esperanza (SW Spain)
  11. The effect of fO₂ on the partitioning and valence of V and Cr in garnet/melt pairs and the relation to terrestrial mantle V and Cr content
  12. An experimental study of OH solubility in rutile at 500–900 °C, 0.5–2 GPa, and a range of oxygen fugacities
  13. The growth interval of garnet in the UHP eclogites from the Dabie orogen, China
  14. Structural studies of NH4-exchanged natrolites at ambient conditions and high temperature
  15. Morphology and microstructure of magnetite and ilmenite inclusions in plagioclase from Adirondack anorthositic gneiss
  16. Thermodynamic properties of stishovite by low-temperature heat capacity measurements and the coesite-stishovite transition boundary
  17. Mechanisms of Cr and H incorporation in stishovite determined by single-crystal EPR spectroscopy and DFT calculations
  18. Paramagnetic interactions in the 31P NMR spectroscopy of rare earth element orthophosphate (REPO4, monazite/xenotime) solid solutions
  19. Garnet sector and oscillatory zoning linked with changes in crystal morphology during rapid growth, North Cascades, Washington
  20. Phase stability, elastic behavior, and pressure-induced structural evolution of kalsilite: A ceramic material and high-T/high-P mineral
  21. A new type of high-pressure low-flow metering valve for continuous decompression: First experimental results on degassing of rhyodacitic melts
  22. Substitution mechanisms and implications for the estimate of water fugacity for Ti-rich phlogopite from Mt. Vulture, Potenza, Italy
  23. Calibration for IR measurements of OH in apatite
  24. Electrolytic coloration and spectral properties of natural calcite crystals
  25. Compositional dependent compressibility of dissolved water in silicate glasses
  26. In situ monitoring of lepidocrocite bioreduction and magnetite formation by reflection Mössbauer spectroscopy
  27. Direct determination of europium valence state by XANES in extraterrestrial merrillite: Implications for REE crystal chemistry and martian magmatism
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