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Site occupancy in richterite-winchite from Libby, Montana, USA, by FTIR spectroscopy

  • G. Iezzi (a1), G. Della Ventura (a2), F. Bellatreccia (a2), S. Lo Mastro (a2), B. R. Bandli (a3) and M. E. Gunter (a4)...

Abstract

Three natural amphibole samples collected from the former vermiculite mine near Libby, Montana. USA, have been analysed by Rietveld X-ray powder diffraction (XRPD) refinement and Fourier transform infrared spectroscopy (FTIR) in the OH-stretching region. The same materials have been analysed previously by electron microprobe analysis (EMPA), Mössbauer spectroscopy and structure refinement (SREF) single crystal X-ray diffraction (SC-XRD), which revealed that these amphiboles have a crystal chemical formula very close to an intermediate composition between winchite and richterite, i.e. AA0.5 BNaCaCMg4.5M3+T 0.5Si8O22(OH)2 (A = Na and/or K; M 3+ = Fe3+ and/or Al). The Rietveld analysis showed the powder samples used for the experiments here to be composed only of amphibole. This in turn allowed us to use FTIR OH-stretching data to derive cation ordering on these powder samples. The three FTIR spectra are quite similar and up to four components can be fitted to the patterns. The two lower-frequency components (labelled A and B) can be attributed to a local O(3)-H dipole surrounded by M(1)M(3)Mg3 and M(1)M(3)Mg2Fe2+; (respectively), an empty A site and rSi8 environments; on the contrary, the higher-frequency C and D bands indicate the presence of an occupied A site. The FTIR OH-stretching data alone allow us to calculate the site occupancy of the A, M(1)–M(3) and T sites with confidence, as compared with previously published data. By contrast M(4)- and M(2)-site occupancies are more difficult to evaluate. This study takes advantage of the large database of well characterized synthetic amphiboles, built over the last two decades. The comparison of vibrational spectroscopy data with micro-chemical and crystallographic data reported in this study demonstrate that the FTIR OH-stretching method alone is a valuable and rapid method to derive or at least sensibly constrain site occupancy for natural amphiboles. A much more detailed cation site occupancy can be obtained by combining micro-chemical and FTIR OH-stretching data.

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Bandli, B.R., Gunter, M.E., Twamley, B., Foit, F.F., Jr. and Cornelius, S.B. (2003) Optical, compositional, morphological, and X-ray data on eleven particles of amphibole from Libby, Montana, U.S.A. The Canadian Mineralogist , 41, 1241–1253.
Burns, R.G. and Strens, R.G.J. (1966) Infrared study of the hydroxyl bonds in clinoamphiboles. Science, 153, 890–892.
Deer, W.A., Howie, R.A. and Zussman, J. (1999) Rock-Forming Minerals, Double-Chain Silicates . Geological Society, London, 692 pp.
Delia Ventura, G. (1992) Recent developments in the synthesis and characterization of amphiboles. Synthesis and crystal chemistry of richterite. Trends in Mineralogy , 1, 153–192.
Delia Ventura, G., Robert, J.-L. and Hawthorne, F.C. (1996) Infrared spectroscopy of synthetic (Ni, Mg, Co)-potassium-richterite. Pp. 55–63 in: Mineral Spectroscopy: a Tribute to Roger G. Burns (Dyar, M.D. McCammon, C. and Schaefer, M.W., editors). Special Publication, No. 5, The Geochemical Society, Washington, D.C.
Delia Ventura, G., Robert, J.-L., Raudsepp, M., Hawthorne, F.C. and Welch, M.D. (1997) Site occupancies in synthetic monoclinic amphiboles: Rietveld structure refinement and infrared spectroscopy of (nickel, magnesium, cobalfj-richterite. American Mineralogist, 82, 291–301.
Delia Ventura, G., Hawthorne, F.C, Robert, J.-L., Del Bove, F., Welch, M.D. and Raudsepp, M. (1999) Short-range order of cations in synthetic amphiboles along the richterite-pargasite join. European Journal of Mineralogy, 11, 79–94.
Delia Ventura, G., Hawthorne, F.C, Robert, J.-L. and Iezzi, G. (2003) Synthesis and infrared spectroscopy of amphiboles along the tremolite-pargasite join. European Journal of Mineralogy, 15, 341–347.
Delia Ventura, G., Iezzi, G., Redhammer, G., Hawthorne, F.C Scaillet, B. and Novembre, D. (2005a) Synthesis and crystal-chemistry of amphiboles along the magnesioriebeckite–magnesio-arfvedsonite series as a function of fOl . American Mineralogist , 90, 1375–1383.
Delia Ventura, G., Redhammer, G., Iezzi, G., Hawthorne, F.C Papin, A. and Robert, J.-L. (20056) A Mössbauer and FTIR study of synthetic amphiboles along the magnesioriebeckite–ferri-clinoholmquistite join. Physics and Chemistry of Minerals, 32, 103–113.
Driscall, J., Jenkins, D.M., Dyar, M.D. and Bozhilov, K.N. (2005) Cation ordering in synthetic low-calcium actinolite. American Mineralogist, 90, 900–911.
Gottschalk, M. and Andrut, M. (1998) Structural and chemical characterization of synthetic (Na, K)-richterite solid solutions by EMP, HRTEM, XRD and OH-valence vibrational spectroscopy. Physics and Chemistry of Minerals , 25, 101–111.
Gottschalk, M., Andrut, M., and Melzer, S. (1999) The determination of the cummingtonite content of synthetic tremolite. European Journal of Mineralogy, 11, 967–982.
Gunter, M.E., Dyar, M.D., Twamley, B., Foit, F.F. Jr., and Cornelius, S.B. (2003) Composition, Fe3+/ZFe, and crystal structure of non-asbestiform and asbesti-form amphiboles from Libby, Montana U.S.A. American Mineralogist, 88, 1970–1978.
Hawthorne, F.C. (1983) The crystal chemistry of the amphiboles. The Canadian Mineralogist, 21, 173–480.
Hawthorne, F.C, Delia Ventura, G., Robert, J.-L., Welch, M.D., Raudsepp, M. and Jenkins, D. (1997) A Rietveld and infrared study of synthetic amphiboles along the potassium-richterite-tremolite join. American Mineralogist, 82, 708–716.
Hawthorne, F.C, Welch, M.D., Delia Ventura, G., Shuangxi, Liu, Robert, J.-L. and Jenkins, D.M. (2000) Short-range order in synthetic aluminous tremolites: an infrared and triple-quantum MAS NMR study. American Mineralogist, 85, 1716–1724.
Hawthorne, F.C, Delia Ventura, G., Oberti, R., Robert, J.-L. and Iezzi, G. (2005) Short-range order in minerals: amphiboles. The Canadian Mineralogist, 43, 1895–1920.
Iezzi, G., Delia Ventura, G., Pedrazzi, G., Robert, J.-L. and Oberti, R. (2003a) Synthesis and characterisation of ferri-clinoferroholmqui stite, Li2(Fe +3Fe +2)Si8O22(OH)2. European Journal of Mineralogy , 15, 321–327.
Iezzi, G., Delia Ventura, G., Cámara, F., Pedrazzi, G. and Robert, J.-L. (20036) BNa- BLi solid-solution in A-site vacant amphiboles: synthesis and cation ordering along the ferri-clinoferroholmquisti-te–riebeckite join. American Mineralogist, 88, 955–961.
Iezzi, G., Cámara, F., Delia Ventura, G., Oberti, R., Pedrazzi, G. and Robert, J.-L. (2004a) Synthesis, crystal structure and crystal-chemistry of ferri-clinoholmquistite, Li2Mg2Fe3Si8O22(OH)2. Physics and Chemistry of Minerals , 31, 375–385.
Iezzi, G., Delia Ventura, G., Oberti, R., Cámara, F. and Holtz, F. (20046) Synthesis and crystal-chemistry of Na(NaMg)Mg5Si8O22(OH)2, a P2xlm amphibole. American Mineralogist, 89, 640–646.
Iezzi, G., Delia Ventura, G., Hawthorne, F.C., Pedrazzi, G., Robert, J.-L. and Novembre, D. (2005a) The (Mg-Fe +) substitution in ferri-clinoholmquistite, Li2(Mg, Fe2+)Fe3+ 2Si8O22(OH)2 . European Journal of Mineralogy , 17, 733–740.
Iezzi, G., Gatta, G.D., Kockelmann, W., Delia Ventura, G., Rinaldi, R., Schafer, W., Piccinini, M. and Gaillard, F. (20056) how-T neutron diffraction and synchrotron-radiation IR study of synthetic amphibole Na(NaMg)Mg5Si8O22(OH)2 . American Mineralogist, 90, 695–700.
Iezzi, G., Tribaudino, M., Delia Ventura, G., Nestola, F. and Bellatreccia, F. (2005c) High-r phase transition of synthetic ANaB(LiMg)cMg5Si8O22(OH)2 . Physics and Chemistry of Minerals , 32, 515–523.
Iezzi, G., Delia Ventura, G. and Tribaudino, M. (2006a) Synthetic P21/m amphiboles in the system Li2O-Na2O-MgO-SiO-H2O (LNMSH). American Mineralogist , 91, 425–429.
Iezzi, G., Liu, Z. and Delia Ventura, G. (2006b) Synchrotron infrared spectroscopy of synthetic Na(NaMg)Mg5Si8O22(OH)2 up to 30 GPa: insight on a new high-pressure amphibole polymorph. American Mineralogist, 91, 479–482.
Ishida, K. and Hawthorne, F.C. (2001) Assignment of infrared OH-stretching bands in manganoan magne-sio-arfedsonite and richterite through heat-treatments. American Mineralogist, 86, 965–972.
Ishida, K., Hawthorne, F.C. and Ando, Y. (2002) Fine structure of infrared OH-stretching bands in natural and heat-treated amphiboles of the tremolite-ferro-actinolite series. American Mineralogist, 87, 891–898.
Jenkins, D.M., Bozhilov, K.N. and Ishida, K. (2003) Infrared and TEM characterisation of amphiboles synthesized near the tremolite-pargasite join in the ternary system tremolite-pargasite-cummingtonite. American Mineralogist, 88, 1104–1114.
Larson, A.C. and Von Dreele, R.B. (1997) GSAS: General Structure Analysis System . Document LAUR 86–748, Los Alamos National Laboratory, New Mexico, USA.
Leake, B.E., Woolley, A.R., Birch, W.D., Burke, E.A.J., Ferraris, G., Grice, ID., Hawthorne, F.C, Kisch, H.J., Krivovichev, V.G., Schumacher, J.C., Stephenson, N.C.N. and Whittaker, EJ.W. (2004) Nomenclature of amphiboles: additions and revisions to the International Mineralogical Association's amphibole nomenclature. The Canadian Mineralogist, 41, 1355–1362.
Meeker, G.P., Bern, A.M., Brownfield, I.K., Lowers, H.A., Sutley, S.J., Hoefen, T.M. and Vance, J.S. (2003) The composition and morphology of amphibole from the Rainy Creek Complex, near Libby, Montana. American Mineralogist, 88, 1955–1969.
Melzer, S., Gottschalk, M., Andrut, M. and Heinrich, W. (2000) Crystal chemistry of K-richterite-richterite-tremolite solid solutions: a SEM, EMP, XRD, HRTEM and IR study. European Journal of Mineralogy, 12, 273–291.
Najorka, J. and Gottschalk, M. (2003) Crystal chemistry of tremolite-tschermakite solid solutions. Physics and Chemistry of Minerals, 30, 108–124.
Robert, J.-L., Delia Ventura, G. and Hawthorne, F.C. (1999) Near-infrared study of short-range disorder of OH and F in monoclinic amphiboles. American Mineralogist, 84, 86–91.
Strens, R.S.J. (1974): The common chain, ribbon and ring silicates. Pp. 305–330 in: The Infrared Spectra of Minerals (Farmer, V.C., editor). Monograph, 4, Mineralogical Society, London.
Toby, B.H. (2001) EXPGUI, a Graphical User Interface for GSAS. Journal of Applied Crystallography, 34, 210–213.
Wylie, A.G. and Verkouteren, J.R. (2000) Amphibole asbestos from Libby, Montana: Aspects of nomen-clature. American Mineralogist, 85, 1540–1542.

Keywords

Site occupancy in richterite-winchite from Libby, Montana, USA, by FTIR spectroscopy

  • G. Iezzi (a1), G. Della Ventura (a2), F. Bellatreccia (a2), S. Lo Mastro (a2), B. R. Bandli (a3) and M. E. Gunter (a4)...

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