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Mushroom elbaite from the Kat Chay mine, Momeik, near Mogok, Myanmar: I. Crystal chemistry by SREF, EMPA, MAS NMR and Mössbauer spectroscopy

Published online by Cambridge University Press:  05 July 2018

A. J. Lussier ,
P. M. Aguiar ,
V. K. Michaelis ,
S. Kroeker ,
S. Herwig ,
Y. Abdu  and
F. C. Hawthorne
A. J. Lussier
Affiliation:
Department of Geological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
P. M. Aguiar
Affiliation:
Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
V. K. Michaelis
Affiliation:
Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
S. Kroeker
Affiliation:
Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
S. Herwig
Affiliation:
Department of Geological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
Y. Abdu
Affiliation:
Department of Geological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
F. C. Hawthorne*
Affiliation:
Department of Geological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
*
*E-mail: frank_hawthorne@umanitoba.ca
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Abstract

Tourmaline from the Kat Chay mine, Momeik, near Mogok, Shan state, Myanmar, shows a variety of habits that resemble mushrooms, and it is commonly referred to as ‘mushroom tourmaline'. The structure of nine single crystals of elbaite, ranging in colour from pink to white to black and purple, extracted from two samples of mushroom tourmaline from Mogok, have been refined (SREF) to R indices of ~2.5% using graphite-monochromated Mo-Kα X-radiation. 11B and 27Al Magic Angle Spinning Nuclear Magnetic Resonance spectroscopy shows the presence of [4]B and the absence of [4]Al in samples with transition-metal content low enough to prevent paramagnetic quenching of the signal. Site populations were assigned from refined site-scattering values and unit formulae derived from electron-microprobe analyses of the crystals used for X-ray data collection. 57Fe Mössbauer spectroscopy shows that both Fe2+ and Fe3+ are present, and the site populations derived by structure refinement show that there is no Fe at the Z site; hence all Fe2+ and Fe3+ occurs at the Y site. The 57Fe Mössbauer spectra also show peaks due to intervalence charge-transfer involving Fe2+ and Fe3+ at adjacent Y sites. Calculation of the probability of the total amount of Fe occurring as Fe2+–Fe3+ pairs for a random short-range distribution is in close accord with the observed amount of Fe involved in Fe2+–Fe3+, indicating that there is no short-range order involving Fe2+ and Fe3+ in these tourmalines.

Keywords

elbaitetourmalinecrystal-structureelectron-microprobe analysisMössbauer spectroscopymagic-angle-spinning nuclear magnetic resonanceMogokMyanmar
Type
Research Article
Information
Mineralogical Magazine , Volume 72 , Issue 3 , June 2008 , pp. 747 - 761
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

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References

Aurisicchio, C Ottolini, L. and Pezzotta, F. (1999) Electron- and ion-microprobe analyses, and genetic inferences of tourmalines of the foitite-schorl solid solution. European Journal of Mineralogy, 11, 217–225.CrossRefGoogle Scholar
Bloodaxe, E.S., Hughes, J.M., Dyar, M.D., Grew, E.S. and Guidotti, C.V. (1999) Linking structure and chemistry in the schorl-dravite series. American Mineralogist, 84, 922–928.CrossRefGoogle Scholar
Bosi, F. and Lucchesi, S. (2004) Crystal chemistry of the schorl—dravite series. European Journal of Mineralogy, 16, 335–344.CrossRefGoogle Scholar
Bosi, F., Lucchesi, S. and Reznitskii, L. (2004) Crystal chemistry of the dravite—chromdravite series. European Journal of Mineralogy, 16, 345–352.CrossRefGoogle Scholar
Bosi, F., Andreozzi, G.B., Federico, M., Graziani, G. and Lucchesi, S. (2005) Crystal chemistry of the elbaite—schorl series. American Mineralogist, 90, 1784–1792.CrossRefGoogle Scholar
Bray, PJ. (1999) NMR and NQR studies of boron in vitreous and crystalline borates. Inorganica Chimica Ada, 289, 158–173.CrossRefGoogle Scholar
Burns, P.C., Macdonald, DJ. and Hawthorne, F.C. (1994) The crystal chemistry of manganese—bearing elbaite. The Canadian Mineralogist, 32, 31–41.Google Scholar
Burns, R.G. (1981) Intervalence transitions in mixed-valence minerals of iron and titanium. Annual Review of Earth and Planetary Sciences, 9, 345–383.CrossRefGoogle Scholar
Camara, F., Ottolini, L. and Hawthorne, F.C. (2002) Crystal chemistry of three tourmalines by SREF, EMPA, and SIMS. American Mineralogist, 87, 1437–1442.CrossRefGoogle Scholar
de Oliveira, E.F., Castaneda, C Eeckhout, S.G., Gilmar, M.M., Kwitko, RR., de Grave, E. and Botelho, N.F. (2002) Infrared and Mossbauer study of Brazilian tourmalines from different geological environments. American Mineralogist, 87, 1154–1163.CrossRefGoogle Scholar
Dyar, M.D., Taylor, M.E., Lutz, T.M., Francis, C.A., Robertson, J.D., Cross, L.M., Guidotti, C.V. and Wise, M. (1998) Inclusive chemical characterization of tourmaline: Mossbauer study of Fe valence and site occupancy. American Mineralogist, 83, 848–864.CrossRefGoogle Scholar
Eeckhout, S.G., Corteel, C van Coster, E., de Grave, E. and de Paepe, P. (2004) Crystal-chemical characterization of tourmalines from the English Lake District: electron-microprobe analyses and Mossbauer spectroscopy. American Mineralogist, 89, 1743–1751.CrossRefGoogle Scholar
Ertl, A. and Hughes, J.M. (2002) The crystal structure of an aluminum-rich schorl overgrown by boron-rich olenite from Koralpe, Styria, Austria. Mineralogy and Petrology, 75, 1–2, 69–78.CrossRefGoogle Scholar
Ertl, A., Hughes, J.M., Brandstatter, F., Dyar, M.D. and Prasad, P.S.R. (2003a) Disordered Mg-bearing olenite from a granitic pegmatite from Goslarn, Austria: A chemical, structural, and infrared spectroscopic study. The Canadian Mineralogist, 41, 1363–1370.CrossRefGoogle Scholar
Ertl, A., Hughes, J.M., Prowatke, S., Rossman, G.R., London, D. and Fritz, E.A. (2003) Mn-rich tourmaline from Austria: structure, chemistry, optical spectra, and relations to synthetic solid solutions. American Mineralogist, 88, 1369–1376.CrossRefGoogle Scholar
Ertl, A., Pertlik, F., Dyar, M.D., Prowatke, S., Hughes, J.M., Ludwig, T. and Bernhardt, H.-I (2004) Fe-rich Olenite with tetrahedrally coordinated Fe3+ from Eibenstein, Austria: Structural, chemical, and Mossbauer data. The Canadian Mineralogist, 42, 1057–1063.CrossRefGoogle Scholar
Ertl, A., Rossman, G.R., Hughes, J.M, Prowatke, S. and Ludwig, T. (2005) Mn-bearing ‘oxy-rossmanite’ with tetrahedrally coordinated Al and B from Austria: Structure, chemistry, and infrared and optical spectroscopic study. American Mineralogist, 90,481–487.CrossRefGoogle Scholar
Ertl, A., Hughes, J.M., Prowatke, S., Ludwig, T., Brandstatter, F., Korner, W. and Dyar, M.D. (2007) Tetrahedrally coordinated boron in Li-bearing olenite from ‘Mushroom’ tourmaline from Momeik, Myanmar. The Canadian Mineralogist, 45, 891–899.CrossRefGoogle Scholar
Faye, G.H., Manning, P.G., Gosselin, J.R. and Tremblay, RJ. (1974) The optical absorption spectra of tourmaline: importance of charge-transfer processes. The Canadian Mineralogist, 12, 370–380.Google Scholar
Ferrow, E.A. (1994) Mossbauer effect study of the crystal chemistry of tourmaline. Hyperfine Interactions, 91, 689–695.CrossRefGoogle Scholar
Francis, C.A., Dyar, M.D., Williams, MX. and Hughes, J.M. (1999) The occurrence and crystal structure of foitite from a tungsten-bearing vein at Copper Mountain, Taos County, New Mexico. The Canadian Mineralogist, 37, 1431–1438.Google Scholar
Grice, J.D. and Ercit, T.S. (1993) Ordering of Fe and Mg in the tourmaline crystal structure: the correct formula. Neues Jahrbuch fur Mineralogie Abhandlungen, 165, 245–266.Google Scholar
Grice, J.D., Ercit, T.S. and Hawthorne, F.C. (1993) Povondraite, a redefinition of the tourmaline ferridravite. American Mineralogist, 78, 433–436.Google Scholar
Hawthorne, F.C. (1988) Mossbauer spectroscopy. Pp. 255–340 in: Spectroscopic Methods in Mineralogy and Geology (Hawthorne, F.C., editor). Reviews in Mineralogy, 18, Mineralogical Society of America, Washington, D.C. CrossRefGoogle Scholar
Hawthorne, F.C. (1996) Structural mechanisms for light-element variations in tourmaline. The Canadian Mineralogist, 34, 123–132.Google Scholar
Hawthorne, F.C. (2002) Bond-valence constraints on the chemical composition of tourmaline. The Canadian Mineralogist, 40, 789–798.CrossRefGoogle Scholar
Hawthorne, F.C. and Henry, D.J. (1999) Classification of the minerals of the tourmaline group. European Journal of Mineralogy, 11, 201–215.CrossRefGoogle Scholar
Hawthorne, F.C., Burns, P.C. and Grice, J.D. (1996) The crystal chemistry of boron. Pp. 41–115 in: Boron: Mineralogy, Petrology and Geochemistry (Grew, E.E. and Anovitz, L.M., editors). Reviews in Mineralogy, 33, Mineralogical Society of America, Washington, D.C. CrossRefGoogle Scholar
Hawthorne, F.C., Macdonald, DJ and Burns, P.C. (1993) Reassignment of cation site occupancies in tourmaline: Al-Mg disorder in the crystal structure of dravite. American Mineralogist, 78, 265–270.Google Scholar
Henry, DJ. and Dutrow, B.L. (1992) Tourmaline in low-grade clastic sedimentary rocks: an example of the petrogenetic potential of tourmaline. Contributions to Mineralogy and Petrology, 112, 203–218.CrossRefGoogle Scholar
Henry, DJ. and Dutrow, B.L. (1996) Metamorphic tourmaline and its petrogenetic applications. Pp. 503–557 in: Boron: Mineralogy, Petrology and Geochemistry (Grew, E.E. and Anovitz, L.M., editors). Reviews in Mineralogy, 33, Mineralogical Society of America, Washington, D.C. CrossRefGoogle Scholar
Henry, DJ. and Guidotti, C.V. (1985) Tourmaline as a petrogenetic indicator mineral: an example from the staurolite-grade metapelites of NW Maine. American Mineralogist, 70, 1–15.Google Scholar
Hia, K., Themelis, T. and Kyaw, T. (2005) The pegmatitic deposits of Molo (Momeik) and Sakan-gyi (Mogok). Australian Gemologist, 22, 303–309.Google Scholar
Hughes, J.M., Ertl, A., Dyar, M.D., Grew, E.S., Shearer, C.K., Yates, M.G. and Guidotti, C.V. (2000) Tetrahedrally coordinated boron in a tourmaline: boron-rich olenite from Stoffhiitte, Koralpe, Austria. The Canadian Mineralogist, 38, 861–868.CrossRefGoogle Scholar
Hughes, J.M., Ertl, A., Dyar, M.D., Grew, E.S., Wiedenbeck, M. and Brandstatter F. (2004) Structural and chemical response to varying ^B content in zoned Fe-bearing olenite from Koralpe, Austria. American Mineralogist, 89, 447–454.CrossRefGoogle Scholar
Kalt, A., Schreyer, W., Ludwig, T., Prowatke, S., Bernhardt, H.-I and Ertl, A. (2001) Complete solid solution between magnesian schorl and lithian excess-boron olenite in a pegmatite from the Koralpe (eastern Alps, Austria). European Journal of Mineralogy, 13, 1191–1205.CrossRefGoogle Scholar
Keller, P.C. (1983) The rubies of Burma: A review of the Mogok stone tract. Gems & Gemology, 6, 209–219.CrossRefGoogle Scholar
Kriz, H.M. and Bray, PJ. (1971) The nB Quadrupole Interaction and non-bridging oxygens in crystalline borates. Journal of Magnetic Resonance, 4, 76–84.Google Scholar
Kroeker, S. and Stebbins, J.F. (2001) Three-coordinated boron-11 chemical shifts in borates. Inorganic Chemistry, 40, 6239–6246.CrossRefGoogle ScholarPubMed
Lussier, A.J., Hawthorne, F.C., Aguiar, P., Michaelis, V. and Kroeker, S. (2008) The occurrence of tetra hedrally coordinated Al and B in tourmaline: A nB and 27A1 MAS NMR study. American Mineralogist (in press).Google Scholar
Macdonald, DJ. and Hawthorne, F.C. (1995) The crystal chemistry of Si-Al substitution in tourmaline. The Canadian Mineralogist, 33, 849–858.Google Scholar
Marler, B. and Ertl, A. (2002) Nuclear magnetic resonance and infrared spectroscopic study of excess-boron olenite from Koralpe, Styria, Austria. American Mineralogist, 87, 364–367.CrossRefGoogle Scholar
Marschall, H.R., Ertl, A., Hughes, J.M. and McCammon, C. (2004) Metamorphic Na- and OH-rich disordered dravite with tetrahedral boron associated with omphacite, from Syros, Greece: chemistry and structure. European Journal of Mineralogy, 16, 817–823.CrossRefGoogle Scholar
Massiot, D., Bessada, C Coutures, I.P. and Taulelle, F. (1990) A quantitative study of 27A1 MAS NMR in crystalline YAG. Journal of Magnetic Resonance, 90,231–242.Google Scholar
Mattson, S.M. and Rossman, G.R. (1984) Ferric iron in tourmaline. Physics and Chemistry of Minerals, 11, 225–234.CrossRefGoogle Scholar
Mattson, S.M. and Rossman, G.R. (1987) Fe2+-Fe3+ interactions in tourmaline. Physics and Chemistry of Minerals, 14, 163–171.CrossRefGoogle Scholar
Mattson, S.M. and Rossman, G.R. (1988) Fe2+-Ti4+ charge transfer in stoichiometric Fe2+,Ti4+-minerals. Physics and Chemistry of Minerals, 16, 78–82.CrossRefGoogle Scholar
Michaelis, V.K., Aguiar, P.M. and Kroeker, S. (2007) Probing alkali coordination environments in alkali borate glasses by multinuclear magnetic resonance. Journal of Non-Crystalline Solids, 353, 2582–2590.CrossRefGoogle Scholar
Neiva, A.M.R., Manuela, M., Silva, V.G. and Gomes, M.E. (2007) Crystal chemistry of tourmaline from Variscan granites, associated tin-tungsten- and gold deposits, and associated metamorphic and metaso-matic rocks from northern Portugal. Neues Jahrbuch fur Mineralogie Abhandlungen, 184, 45–76.CrossRefGoogle Scholar
Novak, M. and Povondra, P. (1995) Elbaite pegmatites in the Moldanubicum: a new subtype of the rare-element class. Mineralogy and Petrology, 55, 159–176.CrossRefGoogle Scholar
Novak, M., Selway, J., Cerny, P., Hawthorne, F.C. and Ottolini, L. (1999) Tourmaline of the elbaite-dravite series from an elbaite-subtype pegmatite at Blizna, southern Bohemia, Czech Republic. European Journal of Mineralogy, 11, 557–568.CrossRefGoogle Scholar
Povondra, P. and Novak, M. (1986) Tourmalines in metamorphosed carbonate rocks from western Moravia, Czechoslovakia. Neues Jahrbuch fur Mineralogie Monatshefte, 1986, 273–282.Google Scholar
Schreyer, W., Wodara, U., Marler, B., van Aken, P.A., Seifert, F. and Robert, J.-L. (2002) Synthetic tourmaline (olenite) with excess boron replacing silicon in the tetrahedral site: I. Synthesis conditions, chemical and spectroscopic evidence. European Journal of Mineralogy, 12, 529–541.CrossRefGoogle Scholar
Selway, J., Cerny, P. and Hawthorne, F.C. (1998) Feruvite from lepidolite pegmatites at Red Cross Lake, Manitoba. The Canadian Mineralogist, 36, 433–439.Google Scholar
Selway, J.B., Novak, M. Cerny, P. and Hawthorne, F.C. (1999) Compositional evolution of tourmaline in lepidolite-subtype pegmatites. European Journal of Mineralogy, 11, 569–584.CrossRefGoogle Scholar
Selway, J.B., Novak, M., Cerny, P. and Hawthorne, F.C. (2000a) The Tanco pegmatite at Bernic Lake, Manitoba. XIII. Exocontact tourmaline. The Canadian Mineralogist, 38, 869–976.CrossRefGoogle Scholar
Selway, J.B., Cerny, P., Hawthorne, F.C. and Novak, M. (20006) The Tanco pegmatite at Bernic Lake, Manitoba. XIV. Internal tourmaline. The Canadian Mineralogist, 38, 877–891.CrossRefGoogle Scholar
Selway, J.B., Smeds, S-A., Cerny, P. and Hawthorne, F.C. (2002) Compositional evolution of tourmaline in the petalite-subtype Nykopingsgruvan pegmatites, Uto, Stockholm Archipelago, Sweden. GFF, 124, 93–102.CrossRefGoogle Scholar
Sheldrick, G.M. (1998) SADABS User Guide, University of Gottingen, Germany.Google Scholar
Skibsted, J., Nielsen, N. Chr., Bildsoe, H. and Jakobsen, H.J. (1992) 51V MAS NMR spectroscopy: determination of quadrupole and anisotropic shielding tensors, including the relative orientation of their principal-axis systems. Chemical Physics Letters, 188(5–6), 405–412.CrossRefGoogle Scholar
Skibsted, J., Nielsen, N. Chr., Bildsoe, H. and Jakobsen, H.J. (1993) Magnitudes and relative orientation of 51V quadrupole coupling and anisotropic shielding tensors in metavanadates and KV3O8 from V MAS NMR spectra. 23Na quadrupole coupling parameters for a- and P-NaVO3 . Journal of the American Chemical Society, 115, 7351–7362.CrossRefGoogle Scholar
Smith, G. (1978a) A reassessment of the role of iron in the 5000–30,000 cm“1 range of the electronic absorption spectra of tourmaline. Physics and Chemistry of Minerals, 3 343–373.CrossRefGoogle Scholar
Smith, G. (19786) Evidence for absorption by exchange-coupled Fe2+-Fe3+ pairs in the near infrared spectra of minerals. Physics and Chemistry of Minerals, 3, 375–383.CrossRefGoogle Scholar
Smith, G. and Strens, R.G. (1976) Intervalence transfer absorption in some silicate, oxides, and phosphate minerals. Pp. 583–612 in: The Physics and Chemistry of Minerals and Rocks (Strens, R.G.J., editor). Wiley, New York.Google Scholar
Tagg, S.L., Cho, H., Dyar, M.D. and Grew, E.S. (1999) Tetrahedral boron in naturally occurring tourmaline. American Mineralogist, 84, 1451–1455.CrossRefGoogle Scholar
Taran, M.N. and Rossman, G.R. (2002) High-temperature, high-pressure optical spectroscopy study of ferric-iron-bearing tourmaline. American Mineralogist, 87, 1148–1153.CrossRefGoogle Scholar
Taran, M.N., Lebedev, A.S. and Platonov, A.N. (1993) Optical absorption spectroscopy of synthetic tourmalines. Physics and Chemistry of Minerals, 20, 209–220.CrossRefGoogle Scholar
Taylor, M.C., Cooper, M.A. and Hawthorne, F.C. (1995) Local charge-compensation in hydroxy-deficient uvite. The Canadian Mineralogist, 33, 1215–1221.Google Scholar
Themelis, T. (2007) Gems and Mines of Mogok: The Forbidden Land. A & T Press, Bangkok, Thailand.Google Scholar
Zaw, K. (1998) Geological evolution of selected granitic pegmatites in Myanmar (Burma): constraints from regional setting, lithology, and fluid-inclusion studies. International Geology Review, 40, 647–662.CrossRefGoogle Scholar