Skip to main content
SpringerLink
Log in

Synthesis and characterization of themixed valent iron silicate ilvaite, CaFe3[Si2O7/O/(OH)]

Synthese und Charakterisierung des gemischt valenten Eisensilikates Ilvait, CaFe3 [Si2O7/ 0/(OH)]

  • Published:
Mineralogy and Petrology Aims and scope Submit manuscript

Summary

The mixed valent iron silicate ilvaite CaFe 22 +Fe3+ [Si2O7/O/(OH)] has been synthesized under hydrothermal conditions at temperatures between 300 and 500°C, pressures between 1.5 and 4 Kbars and oxygen fugacities controlled by the solid state buffers Fe3O4/Fe2O3, Fe/Fe3O4 and Ni/NiO. All these ilvaites are monoclinic (P21/a with cell parameters a0 = 13.0065 (9) Å, b0 = 8.8073 (7) Å, c0 = 5.8580 (4) Å, and β = 90.332 (6)°. The quality of the samples has been checked by Mössbauer spectroscopy. Scanning electron microscopic pictures show small euhedral crystals with a size up to 30 μ.

Zusammenfassung

Das gemischt valente Eisensilikat Ilvait CaFe 22 +Fe3+ [Si2O7/0/(OH)] wurde unter hydrothermalen Bedingungen bei Temperaturen zwischen 300 und 500 °C, Drucken zwischen 1,5 und 4,0 Kbar und bei Sauerstoff-Fugazitäten, die durch Festkörperpuffer (Fe3O4/Fe2O3, Fe/Fe3O4 and Ni/NiO) kontrolliert wurden, hergestellt. Diese Ilvaite sind alle monoklin mit den Zellparameters a0=13,0065 (9) Å, b0 = 8,8073 (7) Å, c0 = 5,8580 (4) Å und β = 90,332 (6)°. Die Qualität der Proben wurde mit Mössbauer Spektroskopie überprüft. Rasterelektronenmikroskopische Aufnahmen zeigten idiomorphe Kristalle mit einer Größe bis 30 μ.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Amthauer G, Evans BJ (1978) Single crystal and high pressure57Fe Mössbauer studies of ilvaite, CaFe 2+2 Fe3+ [Si2O7/O/(OH)] at 298K. Phys Chem Minerals 3: 66

    Google Scholar 

  • Bartholomé P, Dimanche F (1967) On the parageneses of ilvaite in italian skarns. Ann Soc Géol Belgique 90: 533–558

    Google Scholar 

  • — (1968) Sur une forme monoclinique de l'ilvaite. Ann Soc Géol Belgique 90: 779–788

    Google Scholar 

  • Belov NV, Mokeeva VI (1954) The crystal structure of ilvaite. Trudy Inst Kristallogr Akad Nauk SSSR 9: 89–102

    Google Scholar 

  • Beran A, Bittner H (1974) Untersuchungen zur Kristallchemie des Ilvaits. Tschermaks Mineral Petrogr Mitt 21: 11–29

    Google Scholar 

  • Burt DM (1971 a) The facies of some Ca-Fe-Si skarns in Japan. Carn Inst Wash Yearbook 70: 185–188

    Google Scholar 

  • — (1971 b) Multisystems analysis of the relative stabilities of babingtonite and ilvaite. Carn Inst Wash Yearbook 70: 189–197

    Google Scholar 

  • Coey JMD, Allan J, Xuemin K, Van Dang N, Ghose S (1984) Magnetic and electrical properties of ilvaite. J Appl Phys 55: 1963–1965

    Google Scholar 

  • Dietrich V (1972) Ilvait, Ferroantigorit und Greenalith als Begleiter oxidisch-sulfidischer Vererzungen in den Oberhalbsteiner Serpentiniten. Schweiz Mineral Petrogr Mitt 52: 57–74

    Google Scholar 

  • Evans BJ (1975) Experimental studies of the electrical conductivity and phase transition in Fe3O4. AIP Conf Proc 24: 73–78

    Google Scholar 

  • — (1980) The electronic structure of ilvaite and the pressure and temperature dependence of its57Fe Mössbauer spectrum. J Phys Chem Solids 41: 985–1001

    Google Scholar 

  • Finger LW, Hazen RM, Hughes JM (1982) Crystal structure of monoclinic ilvaite. Carn Inst Wash Yearbook 81: 386–388

    Google Scholar 

  • Gerard A, Grandjean F (1971) Observation by Mössbauer effect of an electron hopping process in ilvaite. Solid State Commun 9: 1845–1849

    Google Scholar 

  • Ghose S, Hewat AW, Marezio M, Dang NV, Robie RA, Evans HT (1984) Electron and spin ordering and associated phase transitions in ilvaite, a mixed valence iron silicate. Eos 65: 289

    Google Scholar 

  • Gustafson WI (1974) The stability of andradite, hedenbergite and related minerals in the system Ca-Fe-Si-O-H. J Petrology 15: 455–496

    Google Scholar 

  • Haga N, Takeuchi Y (1976) Neutron diffraction study of ilvaite. Z Kristallogr 144: 161–174

    Google Scholar 

  • Heilmann IU, Olsen NB, Staun Olsen J (1977) Electron hopping and temperature dependent oxidation states of iron in ilvaite studied by Mössbauer effect. Physica Scripta 15: 285–288

    Google Scholar 

  • Herzenberg CL, Riley DL (1969) Oxidation States and site symmetries of iron in ilvaite using Mössbauer spectrometry. Acta Cryst A 25: 389–391

    Google Scholar 

  • Liou JG (1974) Stability relations of andradite-quartz in the system Ca-Fe-Si-O-H. Amer Miner 59: 1016–1025

    Google Scholar 

  • Litterst FJ, Amthauer G (1984) Electron delocalization in ilvaite, a reinterpretation of its57Fe Mössbauer spectrum. Phys Chem Minerals 10: 250–255

    Google Scholar 

  • Nolet DA, Burns RG (1979) Ilvaite: A study of temperature dependent electron delocalization by the Mössbauer effect. Phys Chem Minerals 4: 221–234

    Google Scholar 

  • Takéuchi Y, Haga N, Bunno M (1983) X-ray study on polymorphism of ilvaite, HCaFe 2+2 Fe3+O2 [Si2O7] Z Kristallogr 163: 267–283

    Google Scholar 

  • Yamanaka T, Takéuchi Y (1979) Mössbauer spectra and magnetic features of ilvaites. Phys Chem Minerals 4: 149–159

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute of Mineralogy, University of Marburg, Lahnberge, D-3550, Marburg, Germany

    B. Ghazi-Bayat', K. Schürmann' & E. Hellner'

  2. Institute of Geosciences, University of Salzburg, Hellbrunner Strasse 34, A-5520, Salzburg, Austria

    G. Amthauer

Authors
  1. B. Ghazi-Bayat'
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. G. Amthauer
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. K. Schürmann'
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. E. Hellner'
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

With 6 Figures

Rights and permissions

Reprints and permissions

About this article

Cite this article

Ghazi-Bayat', B., Amthauer, G., Schürmann', K. et al. Synthesis and characterization of themixed valent iron silicate ilvaite, CaFe3[Si2O7/O/(OH)]. Mineralogy and Petrology 37, 97–108 (1987). https://doi.org/10.1007/BF01164185

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01164185

Keywords

Search

Navigation