Refereed Publications
Note: Names in italics are students or fellows supervised or co-supervised by me.
Brand, A.A., Groat, L.A., Linnen, R.L., Garland, M.I., Breaks, F.W., and Giuliani, G. (2009) Emerald mineralization associated with the Mavis Lake Pegmatite Group, near Dryden, Ontario. Canadian Mineralogist, 47 (in press).
Groat, L.A. and Laurs, B.M. (2009) Gem formation, production, and exploration: Why gem deposits are rare, and what is being done to find them. Elements, 5 (in press).
Mossman, D.J., Ehrman, J.M., Brüning, R., Semple, L., and Groat, L.A. (2009) “Skunk” calcite: mineral paragenesis in an amethyst geode from Ametista, Rio Grande do Sul, Brazil. Mineralogical Record, 40, 121-126.
Groat, L.A., Giuliani, G., Marshall, D.D., and Turner, D.J. (2008) Emerald deposits and occurrences: A review. Ore Geology Reviews, 34, 87-112.
Rondeau, B., Fritsch, E., Peucat, J.-J., Nordrum, F.S., and Groat, L.A. (2008) Emeralds from Byrud (Eidsvoll), Norway. Gems and Gemology, 44, 108-122.
Basciano, L.C. and Groat, L.A. (2007) The crystal structure of kampfite. Canadian Mineralogist, 45, 935-943.
Cerný, P., Ercit, T.S., Smeds, S.-A., and Groat, L.A. (2007) Zirconium and hafnium in minerals of the columbite and wodginite groups from granitic pegmatites. Canadian Mineralogist, 45, 185-202.
Dzikowski, T.J., Groat, L.A., and Grew, E.S. (2007) The geometric effects of VFe2+ for VMg substitution on the crystal structures of the grandidierite-ominelite series. American Mineralogist, 92, 863-872.
Jambor, J.L., Roberts, A.C., Groat, L.A., Stanley, C.J., Criddle, A.J., and Feinglos, M.N. (2007) Calvertite, Cu5Ge0.5S4, a new mineral species from Tsumeb, Namibia. Canadian Mineralogist, 45, 1519-1523.
Turner, D.J., Groat, L.A., Hart, C.J.R., Mortensen, J.K., Linnen, R., Giuliani, G., and Wengzynowski, W. (2007) Mineralogical and geochemical study of the True Blue aquamarine showing, southern Yukon. Canadian Mineralogist, 45, 202-227.
Zhang, M., Salje, E.K.H., Carpenter, M., Wang, J.-Y., Groat, L.A., Lager, G., Wang, L., Beran, A., and Bismayer, U. (2007) Temperature dependence of IR absorption of hydrous/hydroxyl species in minerals and synthetic materials. American Mineralogist, 92, 1502-1517.
Dzikowski, T.J., Groat, L.A., and Jambor, J.L. (2006) The symmetry and crystal structure of gorceixite, BaAl3[PO3(O,OH)]2(OH)6, a member of the alunite supergroup. Canadian Mineralogist, 44, 943-949.
Groat, L.A., Hart, C.J.R., Lewis, L.L., and Neufeld, H.L.D. (2005) Emerald and aquamarine mineralization in Canada. Geoscience Canada, 32, 17-28.
Marshall, D.D., Groat, L.A., Falck, H., Giuliani, G., and Neufeld, H.L.D. (2004) The Lened emerald prospect, Northwest Territories, Canada: Insights from fluid inclusions and stable isotopes, with implications for northern Cordillera emeralds. Canadian Mineralogist, 42, 1523-1539.
Groat, L.A., Chakoumakos, B.C., Brouwer, D.H., Morell, H., Fyfe, C.A., and Schultz, A.J. (2003) The amblygonite (LiAlPO4F)-montebrasite (LiAlPO4OH) solid solution: A combined powder and single-crystal diffraction and solid-state 6Li MAS, CP MAS, and REDOR NMR study. American Mineralogist, 88, 195-210.
Groat, L.A., Jambor, J.L., and Pemberton, B.C. (2003) The crystal structure of argentojarosite. Canadian Mineralogist, 41, 921-928.
Groat, L.A., Mulja, T., Ercit, T.S., Mauthner, M.H.F., Raudsepp, M., Gault, R.A., and Rollo, H.A. (2003) The Nahanni spodumene-bearing and lithian mica-bearing pegmatites, Northwest Territories. I. Geology and mineralogy. Canadian Mineralogist, 41, 139-160.
Ercit, T.S., Groat, L.A., and Gault, R.A. (2003) Granitic pegmatites of the O’Grady batholith, NWT – a case study of the evolution of the elbaite subtype of rare element pegmatite. Canadian Mineralogist, 41, 117-137.
Fechtelkord, M., Behrens, H., Holtz, F., Fyfe, C.A., Groat, L.A., and Raudsepp, M. (2003) Influence of fluorine content on the composition of Al-rich synthetic phlogopite, I: New information on structure and phase formation from 29Si, 1H, and 19F MAS NMR spectroscopies. American Mineralogist, 88, 47-53.
Fechtelkord, M., Behrens, H., Holtz, F., Bretherton, J.L., Fyfe, C.A., Groat, L.A., and Raudsepp, M. (2003) Influence of fluorine content on the composition of Al-rich synthetic phlogopite, II: Investigation of the structural arrangement of fluorine and hydroxyl anions in the brucite layers by 27Al MQMAS and 1H/19F-27Al HETCOR and REDOR experiments. American Mineralogist, 88, 1046-1054.
Jambor, J.L., Dutrizac, J.E., Raudsepp, M., and Groat, L.A. (2003) Effect of peroxide on neutralization-potential values of siderite and other carbonate minerals. Journal of Environmental Quality, 32, 2373-2378.
Marshall, D.D., Groat, L.A., Giuliani, G., Murphy, D.C., Mattey, D., Ercit, T.S., Wise, M.A., Wengzynowski, W., and Eaton, W.D. (2003) Pressure, temperature and fluid conditions during emerald precipitation, southeastern Yukon: fluid inclusion and stable isotope evidence. Chemical Geology, 194, 187-199.
Groat, L.A., Marshall, D.D., Giuliani, G., Murphy, D.C., Piercey, S.J., Jambor, J.L., Mortensen, J.K., Ercit, T.S., Gault, R.A., Mattey, D.P., Schwartz, D.P., Maluski, H., Wise, M.A., Wengzynowski, W., and Eaton, W.D. (2002) Mineralogical and geochemical study of the Regal Ridge showing emeralds, southeastern Yukon. Canadian Mineralogist, 40, 1313-1338.
Jambor, J.L., Vinals, J., Groat, L.A., and Raudsepp, M. (2002) Cobaltarthurite, Co2+Fe3+2(AsO4)2(OH)2·4H2O, a new member of the arthurite group. Canadian Mineralogist, 40, 725-732.
Zhang, M., Salje, E.K.H., Bismayer, U., and Groat, L.A. (2002) Metamictization and recrystallization of titanite: an infrared spectroscopic study. American Mineralogist, 87, 882-890.
Basciano, L.C., Groat, L.A., Roberts, A.C., Grice, J.D., Dunning, G.E., Foord, E.E., Kjarsgaard, I.M., and Walstrom, R.E. (2001) Kampfite, a new barium silicate carbonate mineral from Fresno County, California. Canadian Mineralogist, 39, 1053-1058.
Basciano, L.C., Groat, L.A., Roberts, A.C., Gault, R.A., and Dunning, G.E. (2001) Bigcreekite, a new barium silicate mineral from Fresno County, California. Canadian Mineralogist, 39, 779-784.
Fechtelkord, M., Posnatzki, B., Buhl, J.-C., Fyfe, C.A., Groat, L.A., and Raudsepp, M. (2001) Characterization of synthetic lithium-cesium-cancrinite grown in a butanediol-water system: an NMR spectroscopic and Rietveld refinement study. American Mineralogist, 86, 881-888.
Zhang, M., Groat, L.A., Salje, E.K.H., and Beran, A. (2001) Hydrous species in crystalline and metamict titanites. American Mineralogist, 86, 904-909.
Paulmann, C., Bismayer, U., and Groat, L.A. (2000) Thermal annealing of metamict titanite: a synchrotron radiation and optical birefringence study. Zeitschrift für Kristallographie, 215,
Salje, E.K.H., Zhang, M., and Groat, L.A. (2000) Dehydration and recrystallization of radiation-damaged titanite under thermal annealing. Phase Transitions, 71, 173-187.
Deyell, C.L., Thompson, J.F.H., Friedman, R.M., and Groat, L.A. (2000) Age and origin of advanced argillic alteration zones and related exotic limonite deposits in the Limonite Creek area, central British Columbia. Canadian Journal of Earth Sciences, 37, 1093-1107.
Zhang, M., Salje, E.K.H., Malcherek, T., Bismayer, U., and Groat, L.A. (2000) Dehydration of metamict titanite: an infrared spectroscopy study. Canadian Mineralogist, 38, 119-130.
Bismayer, U., Zhang, M., Groat, L.A., Salje, E.K.H., and Meyer, H.-W. (1999) The β-γ phase transition in titanite and the isosymmetric analogue in malayaite. Phase Transitions, 68, 545-556.
Lam, A.E., Groat, L.A., Grice, J.D., and Ercit, T.S. (1999) The crystal structure of choloalite. Canadian Mineralogist, 37, 721-729.
Zhang, M., Meyer, H.-W., Groat, L.A., Bismayer, U., Salje, E.K.H., and Adiwidjaja, G. (1999) An infrared spectroscopic and single-crystal X-ray study of malayaite, CaSnSiO5. Physics and Chemistry of Minerals, 26, 546-553.
Groat, L.A. (1998) The crystal structure of gerenite-(Y), (Ca,Na)2(Y,REE)3Si6O18 2H2O, a cyclosilicate mineral. Canadian Mineralogist, 36, 801-808.
Groat, L.A. and Hawthorne, F.C. (1998) Diffuse reflections and the symmetry of vesuvianite. Phase Transitions, 67, 137-151.
Groat, L.A., Hawthorne, F.C., Ercit, T.S., and Grice, J.D. (1998) Wiluite, Ca19(Al,Mg,Fe,Ti)13(B,Al,)5Si18O68(O,OH)10, a new mineral species isostructural with vesuvianite, from the Sakha Republic, Russian Federation. Canadian Mineralogist, 36, 1301-1304.
Chrosch, J., Colombo, M., Malcherek, T., Salje, E.K.H., Groat, L.A., and Bismayer, U. (1998) Thermal annealing of radiation damaged titanite. American Mineralogist, 83, 1083-1091.
Jambor, J.L., Roberts, A.C., Grice, J.D., Birkett, T.C., Groat, L.A., and Zajac, S. (1998) Gerenite-(Y), (Ca,Na)2(Y,REE)3Si6O18 2H2O, a new mineral, and an associated Y-bearing gadolinite-group mineral, from the Strange Lake peralkaline complex, Quebec-Labrador. Canadian Mineralogist, 36, 793-800.
Lam, A.E., Groat, L.A., and Ercit, T.S. (1998) The crystal structure of dugganite, Pb3Zn3Te6+As2O14. Canadian Mineralogist, 36, 823-830.
Shaw, S.C., Groat, L.A., Jambor, J.L., Blowes, D.W., Hanton-Fong, C.J., and Stuparyk, R.A. (1998) Mineralogical study of base metal tailings with various sulfide contents, oxidized in laboratory columns and field lysimeters. Environmental Geology, 33, 209-217.
Margison, S., Groat, L.A., and Grice, J.D. (1997) The crystal structure of leisingite, Cu(Mg,Cu,Fe,Zn)2Te6+O6·6H2O. Canadian Mineralogist, 35, 765-772.
Szymanski, J.T. and Groat, L.A. (1997) The crystal structure of deanesmithite, Hg1+2Hg2+3Cr6+O5S2. Canadian Mineralogist, 35, 765-772.
Groat, L.A. (1996) The crystal structure of namuwite, a mineral with essential zinc in tetrahedral and octahedral coordination, and its relationship to the synthetic basic zinc sulfates. American Mineralogist, 81, 238-243.
Groat, L.A., Hawthorne, F.C., Lager, G.A., Schultz, A.J., and Ercit, T.S. (1996) X-ray and neutron crystal-structure refinements of a boron-bearing vesuvianite. Canadian Mineralogist, 34, 1059-1070.
Groat, L.A., Kek, S., Bismayer, U., Schmidt, C., Krane, H.G., Meyer, H., Nistor, L., and Van Tendeloo, G. (1996) A synchrotron radiation, HRTEM, X-ray powder diffraction, and Raman spectroscopic study of malayaite, CaSnSiO5. American Mineralogist, 81, 595-602.
Grice, J.D., Groat, L.A., and Roberts, A.C. (1996) Jensenite, a cupric tellurate framework structure with two coordinations of copper. Canadian Mineralogist, 34, 55-60.
Mauthner, M.H.F., Groat, L.A., and Raudsepp, M. (1996) Minerals of the Engineer Mine, Tagish Lake, British Columbia. Mineralogical Record, 27, 263-273.
Mauthner, M.H.F., Groat, L.A., Raudsepp, M., and Attridge, R. (1996) Minerals of the Silvana Mine, Sandon, British Columbia. Mineralogical Record, 27, 433-438.
Roberts, A.C., Groat, L.A., Grice, J.D., Gault, R.A., Jensen, M.C., Moffat, E.A., and Stirling, J.A.R. (1996) Leisingite, Cu(Mg,Cu,Fe,Zn)2Te6+O6·6H2O, a new mineral species from the Centennial Eureka mine, Juab County, Utah. Mineralogical Magazine, 60, 653-657.
Groat, L.A., Bismayer, U., and Güttler, B. (1995) A ferroelastic phase transition in vesuvianite. Phase Transitions, 65, 217-227.
Groat, L.A., Hawthorne, F.C., Rossman, G.R., and Ercit, T.S. (1995) The infrared spectroscopy of vesuvianite in the OH region. Canadian Mineralogist, 33, 609-626.
Groat, L.A., Roberts, A.C., and Le Page, Y. (1995) The crystal structure of wattersite, Hg1+4Hg2+Cr6+O6. Canadian Mineralogist, 33, 41-46.
Mauthner, M.H.F., Mortensen, J.K., Groat, L.A., and Ercit, T.S. (1995) Geochronology of the Little Nahanni Pegmatite Group, Selwyn Mountains, southwestern Northwest Territories. Canadian Journal of Earth Sciences, 32, 2090-2097.
Roberts, A.C., Ercit, T.S., Groat, L.A., Criddle, A.J., Erd, R.C., and Williams, R.S. (1995) Peterbaylissite, Hg1+3(CO3)(OH)·2H2O, a new mineral species from the Clear Creek claim, San Benito County, California. Canadian Mineralogist, 33, 47-54.
Roberts, A.C., Grice, J.D., Groat, L.A., Criddle, A.J., Gault, R.A., Erd, R.C., and Moffatt, E.A. (1995) Jensenite, Cu3Te6+O6·2H2O, a new mineral species from the Centennial Eureka Mine, Tintic district, Juab County, Utah. Canadian Mineralogist, 34, 49-54.
Groat, L.A., Hawthorne, F.C., and Ercit, T.S. (1994a) “Excess” Y-group cations in the crystal structure of vesuvianite. Canadian Mineralogist, 32, 497-504.
Groat, L.A., Hawthorne, F.C., and Ercit, T.S. (1994b) The incorporation of boron into the vesuvianite structure. Canadian Mineralogist, 32, 505-523.
Groat, L.A., Putnis, A., Kissin, S.A., Ercit, T.S., Hawthorne, F.C., and Gaines, R.V. (1994) Staringite discredited. Mineralogical Magazine, 58, 271-277.
Lam, A.E., Groat, L.A., Cooper, M.A., and Hawthorne, F.C. (1994) The crystal structure of wickenburgite, Pb3CaAl [AlSi10O27] (H2O)3, a tetrahedral sheet structure. Canadian Mineralogist, 32, 525-532.
Russell, J.K., Groat, L.A., and Halleran, A.A.D. (1994) LREE-rich niobian titanite from Mount Bisson, British Columbia: Chemistry and exchange mechanisms. Canadian Mineralogist, 32, 575-587.
Groat, L.A., Hawthorne, F.C., Ercit, T.S., and Putnis, A. (1993) The symmetry of vesuvianite. Canadian Mineralogist, 31, 617-635.
Eby, R.K., Janeczek, J., Ewing, R.C., Ercit. T.S., Groat, L.A., Chakomakous, B.C., Hawthorne, F.C., and Rossman, G.R. (1993) Metamictization and alteration of vesuvianite. Canadian Mineralogist, 31, 357-369.
Groat, L.A., Hawthorne, F.C., and Ercit, T.S. (1992a) The chemistry of vesuvianite. Canadian Mineralogist, 30, 19-48.
Groat, L.A., Hawthorne, F.C., and Ercit, T.S. (1992b) The role of fluorine in vesuvianite; a crystal structure study. Canadian Mineralogist, 30, 1065-1075.
Bismayer, U., Schmal, W., Schmidt, C., and Groat, L.A. (1992) Linear birefringence and X-ray diffraction studies of the structural phase transition in titanite, CaTiSiO5. Physics and Chemistry of Minerals, 19, 260-266.
Hawthorne, F.C., Groat, L.A., Raudsepp, M., Ball, N.A., Kimata, M., Gaba, R., Halden, N.M., Lumpkin, G.R., Ewing, R.C., Greegor, R.B., Lytle, F.W., Ercit, T.S., Rossman, G.R., Wicks, F.J., Ramik, R.A., Sheriff, B.L., Fleet, M.E., and McCammon, C. (1991) Alpha-decay damage in titanite. American Mineralogist, 76, 370-396.
Groat, L.A. and Hawthorne, F.C. (1990) The crystal structure of nissonite. American Mineralogist, 75, 1170-1175.
Groat, L.A., Raudsepp, M., Hawthorne, F.C., Ercit, T.S., Sheriff, B.L., and Hartman, J.S. (1990) The amblygonite-montebrasite series: Characterization by single-crystal structure refinement, infrared spectroscopy, and multinuclear MAS MNR spectroscopy. American Mineralogist, 75, 992-1008.
Grice, J.D. and Groat, L.A. (1989) The crystal structure of paulkellerite. American Mineralogist, 73, 873-875.
Hawthorne, F.C., Groat, L.A., and Eby, R. (1989) Antlerite, Cu3SO4(OH)4, a heteropolyhedral wallpaper structure. Canadian Mineralogist, 27, 205-210.
Groat, L.A., Cerný, P., and Ercit, T.S. (1987) Reinstatement of stibiomicrolite as a valid species. Geoliska Föreningen i Stockholm Förhandlinger, 109(2), 105-109.
Groat, L.A. and Hawthorne, F.C. (1987) Refinement of the crystal structure of papagoite, CaCuAlSi2O6(OH)3. Mineralogy and Petrology, 37, 89-96.
Hawthorne, F.C., Groat, L.A., and Ercit, T.S. (1987) Structure of cobalt diselenite. Acta Crystallographica, C43, 2042-2044.
Groat, L.A. and Hawthorne, F.C. (1986) The structure of ungemachite, K3Na8Fe3+(SO4)6(NO3)2·6(OH2), a mixed sulphate-nitrate mineral. American Mineralogist, 71, 826-829.
Hawthorne, F.C. and Groat, L.A. (1986) The crystal structure and chemical composition of cumengéite. Mineralogical Magazine, 50, 157-162.
Hawthorne, F.C., Groat, L.A., Raudsepp, M., and Ercit, T.S. (1986) Kieserite, Mg(SO4)(H2O), a titanite group mineral. Neues Jahrbuch für Mineralogie Abhandlungen, 157, 121-132.
Hawthorne, F.C., Ercit, T.S., and Groat, L.A. (1986) Structure of zinc selenite and copper selenite. Acta Crystallographica, C42, 1285-1287.
Groat, L.A. and Hawthorne, F.C. (1985) Taylorite discredited (= ammonium arcanite). Canadian Mineralogist, 23, 259-260.
Groat, L.A., Hawthorne, F.C., Carter, R.T., and Ercit, T.S. (1985) Tantalian niobian titanite from the Irgon Claim, Southeast Manitoba. Canadian Mineralogist, 23, 569-571.
Hawthorne, F.C. and Groat, L.A. (1985) The crystal structure of wroewolfeite, a mineral with [Cu4(SO4)(OH)6(H2O)] sheets. American Mineralogist, 70, 1050-1055.