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Hansesmarkite, Ca2Mn2Nb6O19·20H2O, a new hexaniobate from a syenite pegmatite in the Larvik Plutonic Complex, southern Norway

Published online by Cambridge University Press:  02 January 2018

H. Friis ,
M. T. Weller  and
A. R. Kampf
H. Friis*
Affiliation:
Natural History Museum, University of Oslo, P.O. Box 1172, Blindern, N-0318 Oslo, Norway
M. T. Weller
Affiliation:
Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK
A. R. Kampf
Affiliation:
Mineral Sciences Department, Natural History Museum of Los Angeles County, 900 Exposition Blvd., Los Angeles, CA 90007, USA
*
*E-mail: [email protected]
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Abstract

The new mineral hansesmarkite (IMA2015-067), Ca2Mn2Nb6O19·20H2O, was discovered at the AS Granit larvikite quarry in Tvedalen, Larvik, Vestfold, Norway. Hansesmarkite forms faintly yellow crystals up to 0.3 mm or thin coatingsin patches on gonnardite. Hansesmarkite is biaxial (+) with refractive indices (white light): α = 1.683(2), β = 1.698(2) and γ = 1.745(3); 2V(meas.) = 60.7(6)° and 2V(calc.) = 60.3°. The mineral exhibits moderate dispersion (r > v)and is pleochroic with X (almost colourless) < Y ( pale yellow) << Z (orangey yellow). The optical orientation is X ^ c = 20°, Y ^ b = 16° and Z ^ a = 5°. The empirical formula based on five electron probemicroanalyses and calculated based on Nb = 6 apfu is (Ca1.93Na0.02K0.01)∑1.96(Mn1.79Fe0.11)∑1.90Nb6O18.84·20H2O, with H2O determined from the structure solution.The mineral is triclinic, P1, with a = 9.081(4), b = 9.982(8), c = 10.60(1) Å, α = 111.07(8), β = 101.15(6), γ = 99.39(5)°, V = 850.8(13) Å3 and Z = 1. The structure was solved at 120 K because of thermalinstability of the mineral and refined to R1 = 2.50% for Fo > 4σ. The strongest reflections in the x-ray diffraction diagram are: [dobs. in Å (I)(hkl)] 9.282(36)(001), 8.610(100)(100, 011), 3.257(30)(031, 131)and 3.058(18)(130, 212). Hansesmarkite is the third naturally occurring hexaniobate in which six edge-sharing Nb-octahedra form the Lindqvist ion. These are linked via Mn-octahedra forming rods along [100] and Ca is located between the rods, creating a three dimensional structure via hydrogen bonds.

Keywords

hexaniobateLindqvist ionhansesmarkitenew mineralLarvik Plutonic Complexsyenite pegmatite
Type
Research Article
Information
Mineralogical Magazine , Volume 81 , Issue 3 , June 2017 , pp. 543 - 554
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2017

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References

Andrade, M.B., Atencio, D. and Menezes Filho, L.A.D. (2015) Melcherite, IMA 2015-018, CNMNC news-letter No. 25, June 2015, Page 547. Mineralogical Magazine, 79, 541–547.Google Scholar
Atencio, D., Coutinho, J.M.V., Doriguetto, A.C., Mascarenhas, YE, Ellena, J. and Ferrari, V.C. (2008) Menezesite, the first natural heteropolyniobate, from Cajati, São Paulo, Brazil: Description and crystal structure. American Mineralogist, 93, 81–87.CrossRefGoogle Scholar
Berzelius, J.J. (1829) Investigation of a new mineral, which contains a hereto unknown element. Kongliga Svenska Vetenskaps — Akademiens Handlingar, 1–30 [in Swedish].Google Scholar
Bontchev, R.P., Venturini, E.L. and Nyman, M. (2007) Copper-linked hexaniobate Lindqvist clusters-variations on a theme. Inorganic Chemistry, 46, 4483–491.CrossRefGoogle ScholarPubMed
Brese, N.E. and O'Keeffe, M. (1991) Bond-valence parameters for solids. Acta Crystallographica, B47, 192–197.CrossRefGoogle Scholar
Brown, I.D. (2002) The Chemical Bond in Inorganic Chemistry: The Bond Valence Model. Oxford University Press, Oxford, UK.Google Scholar
Cooper, M.A., Abdu, Y.A., Ball, N.A., Cerný, P., Hawthorne, F.C. and Kristiansen, R. (2012) Aspedamite, ideally □i2(Fe3+,Fe2+)3N 3 mineral species from the Herrebøkasa quarry, Aspedammen, Østfold, southern Norway: Description and crystal structure. The Canadian Mineralogist, 50, 793–804.CrossRefGoogle Scholar
Dahlgren, S. (2010) The Larvik Plutonic Complex: The larvikite and nepheline syenite plutons and their pegmatites. Pp. 26–37 in: The Langesundsfjord — History, Geology, Pegmatites, Minerals (A.O. Larsen, editor). Bode, Salzhemmendorf, Germany.Google Scholar
Erdmann, A. (1840) Investigation of two new minerals, praseolite and esmarkite. Kongliga Svenska Vetenskaps-Akademiens Handlingar, 181-190. [In Swedish]Google Scholar
Farrell, F.J., Maroni, V.A. and Spiro, T.G. (1969) Vibrational analysis for Nb6Oi9 and Ta6Oi9 and the Raman intensity criterion for metal-metal interaction. Inorganic Chemistry, 8, 2638–2642.CrossRefGoogle Scholar
Farrugia, L.J. (2012) WinGX and ORTEP for Windows: an update. Journal of Applied Crystallography, 45, 849–854.CrossRefGoogle Scholar
Friis, H., Larsen, A.O., Kampf, A.R., Evans, R.J., Selbekk, R.S., Sánchez, A.A. and Kihle, J. (2014) Peterandresenite, Mn4Nb6O19 • 14H2O, a new mineral containing the Lindqvist ion from a syenite pegmatite of the Larvik Plutonic Complex, southern Norway. European Journal of Mineralogy, 26, 567–576.CrossRefGoogle Scholar
Friis, H., Weller, M.T and Kampf, A.R. (2015) IMA 2015-067. CNMNC Newsletter No. 28, December 2015, page 1860. Mineralogical Magazine, 79, 1859–1864.Google Scholar
Gunter, M.E., Bandli, B.R., Bloss, F.D., Evans, S.H., Su, S.-C. and Weaver, R. (2004) Results from a McCrone spindle stage short course, a new version of EXCALIBR, and building a spindle stage. Microscope, 52, 23–39.Google Scholar
Hausmann, J.F.L. (1813): Handbuch der Mineralogie, 3, 761–1158 [in German].Google Scholar
Jehng, J.-M. and Wachs, I.E. (1991) Structural chemistry and Raman-spectra of niobium oxides. Chemistry of Materials, 3, 100–107.CrossRefGoogle Scholar
Lindqvist, I. (1953) The structure of the hexaniobate ion in 7Na2O • 6Nb2O5 • 32H2O. Arkiv for Kemi, 5, 247–250.Google Scholar
Ma, P.T., Wang, G., Chen, G., Wang, J.P. and Niu, J.Y. (2011) A new two-dimensional polyoxoniobate built by Lindqvist-type polyoxoanion and copper coordinated cations K2[Cu(H2O)6] ﹛[Nb6O19][Cu(NH3)]2﹜-8H2O. Journal of Molecular Structure, 997, 126–130.CrossRefGoogle Scholar
Mandarino, J.A. (1981): The Gladstone-Dale relationship: Part IV The compatibility concept and its application. The Canadian Mineralogist, 19, 441–450.Google Scholar
Nyman, M. (2011) Polyoxoniobate chemistry in the 21st century. Dalton Transactions, 40, 8049–8058.CrossRefGoogle ScholarPubMed
Petersen, J.S. (1978) Structure of the larvikite-lardalite complex, Oslo-region, Norway, and its evolution. Geologisches Rundschau, 67, 330–342.CrossRefGoogle Scholar
Pouchou, J.L. and Pichoir, F. (1984) Quantitative micro-analytic possibilities using a new formulation of matrix effects. Journal de Physique, 45, 17–20 [in French].Google Scholar
Sheldrick, G.M. (2008) A short history of SHELX. Acta Crystallographica Section A, 64, 112–122.Google Scholar