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Discreditation of the pyroxenoid mineral name ‘marshallsussmanite’ with a reinstatement of the name schizolite, NaCaMnSi3O8(OH)

Published online by Cambridge University Press:  22 April 2019

Joel D. Grice*
Affiliation:
Canadian Museum of Nature, PO Box 3443 Stn D, Ottawa Canada, KIP 6P4, Canada
Aaron J. Lussier
Affiliation:
Canadian Museum of Nature, PO Box 3443 Stn D, Ottawa Canada, KIP 6P4, Canada
Henrik Friis
Affiliation:
Natural History Museum, University of Oslo, PO Box 1172, Blindern, 0318 Oslo, Norway
Ralph Rowe
Affiliation:
Canadian Museum of Nature, PO Box 3443 Stn D, Ottawa Canada, KIP 6P4, Canada
Glenn G. Poirier
Affiliation:
Canadian Museum of Nature, PO Box 3443 Stn D, Ottawa Canada, KIP 6P4, Canada
Zina Fihl
Affiliation:
Natural History Museum of Denmark, Øster Volgade 5-7, 1350 Copenhagen K, Denmark
*
*Author for correspondence: Joel D. Grice, Email: jgrice@nature.ca

Abstract

Schizolite, originating from the type locality, Tutop Agtakôrfia, in the Ilímaussaq alkaline complex, Julianehåb district, South Greenland, was described initially by Winther (1901) with additional data being supplied by Bøggild (1903). Recently, a proposal for the new mineral ‘marshallsussmanite’ was submitted to, and approved by, the International Mineralogical Association Commission on New Minerals, Nomenclature and Classification (IMA2013-067) by Origlieri et al. (2013). Results from the detailed examination of two schizolite cotype samples presented here, using single-crystal and powder X-ray diffraction, and optical properties, confirms it to be equivalent to ‘marshallsussmanite’. Historical precedence sets a priority for discrediting the name ‘marshallsussmanite’ in favour of the original, more-than-a century-old name, schizolite. The two schizolite samples investigated vary slightly in physical and chemical properties but are consistent overall. The prismatic crystals are pale red or pink to brownish. Schizolite is brittle with a splintery aspect. It is biaxial (+), with average optical parameters: α = 1.626 ± 0.003, β = 1.630 ± 0.002, γ = 1.661 ± 0.002, 2Vmeas = 71(4)° and 2Vcalc = 40°; there is no pleochroism. Electron microprobe analysis shows both samples have nearly identical compositions (differences <0.4 wt.% oxide), with the mean values of: SiO2 52.6(4); Al2O3 0.005(1); FeO 2.54(2); MnO 13.86(9); CaO 17.9(4); Na2O 8.9(1); and H2O 2.59(2) wt.% oxide; this corresponds to a mean formula of: Na1.00(2)Ca1.11(7)Mn0.68(1)Fe0.12(0)Si3.041(1)O8(OH). Final least-squares structure refinements for both samples converged at R1 values ≤2.0%; H atoms were located in all refinements.

Type
Article
Copyright
Copyright © Mineralogical Society of Great Britain and Ireland 2019 

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Footnotes

Associate Editor: Ferdinando Bosi

References

Armstrong, J.T. (1988) Quantitative analysis of silicate and oxide materials: Comparison of Monte Carlo, ZAF, and procedures. Microbeam Analysis, 239246Google Scholar
Bøggild, O.B. (1903) On some minerals from the nepheline-syenite at Julianehaab, Greenland (erikite and schizolite). Meddelelser om Grønland, 26, 91139.Google Scholar
Bruker (2012) TWINABS-2012/1. Bruker AXS Inc., Madison, Wisconsin, USA.Google Scholar
Bruker (2013) SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.Google Scholar
Donovan, J.J., Lowers, H.A. and Rusk, B.G. (2011) Improved electron probe microanalysis of trace elements in quartz. American Mineralogist, 96, 274282.Google Scholar
Flink, G. (1898) Berättelse om en mineralogisk resa I Syd- Grønland sommeren 1897. Meddelelser om Grønland, 14, 221262.Google Scholar
Hålenius, U., Hatert, F., Pasero, M. and Mills, S.J. (2018) IMA Commission on New Minerals, Nomenclature and Classification, Newsletter 43. Mineralogical Magazine, 82, pp. 781787.Google Scholar
Ibers, J.A. and Hamilton, W.C. (1974) International Tables for X-ray Crystallography. The Kynoch Press. Birmingham, UK.Google Scholar
Jacobsen, S.D., Smyth, J.R., Swope, R.J. and Sheldon, R.I. (2000 Two proton positions in the very strong hydrogen bond of serandite. American Mineralogist, 85, 745752.Google Scholar
Lacroix, A. (1931) Les pegmatites de la syénite sodalitique de l’îleRouma. Description d'un nouveau minéral (serandite) qu'elles renferment. Compte Rendus Académie Science Paris, 192, 197–194.Google Scholar
Nagashima, M., Imaoka, T., Fukuda, C. and Pettke, T. (2018) Relationship between cation substitution and hydrogen-bond system in hydrous pyroxenoids with three-periodic single-chains of SiO4 tetrahedra: pectolite, murakamiite, marshallsussmanite, serandite and tanohataite. European Journal of Mineralogy, 30, 451463.Google Scholar
Ohashi, Y. and Finger, L.W. (1978) The role of octahedral cations in pyroxenoid crystal chemistry. I. Bustamite, wollastonite, and the pectolite-schizolite-serandite series. American Mineralogist, 63, 274288.Google Scholar
Origlieri, M.J., Downs, R.T. and Yang, H. (2013) Marshallsussmanite, IMA 2013-067. CNMNC Newsletter No. 18, December 2013, page 3256; Mineralogical Magazine, 77, 32493258.Google Scholar
Origlieri, M.J., Downs, R.T., Yang, H., Hoffman, D.R., Ducea, M.N. and Post, J. (2017) Marshallsussmanite, NaCaMnSi3O8(OH), a new pectolite-group mineral providing insight into hydrogen bonding in pyroxenoids. Mineralogical Magazine, preproof [DOI https://doi.org/10.1180/minmag.2017.081.049].Google Scholar
Petersen, O.V. and Johnsen, O. (2005) Mineral Species First Discovered from Greenland. Canadian Mineralogist, Special Publication, 8. Mineralogical Association of Canada, Quebec, Canada.Google Scholar
Prewitt, C.T. (1967) Refinement of the structure of pectolite, Ca2NaHSi3O9. Zeitz Kristallographie 125, 298316.Google Scholar
Rowe, R. (2009) New statistical calibration approach for Bruker AXS D8 Discover microdiffractometer with Hi-Star detector using GADDS software. Powder Diffraction 24, 263271.Google Scholar
Rozhdestvenskaya, I.V. and Vasilieva, V.A. (2014) Cation ordering and structural deformations in pectolite HNaCa2Si3O9 – serandite HNaMn2Si3O9. Journal of Structural Chemistry, 55, 12681276.Google Scholar
Schaller, W.T. (1955) The pectolite-schizolite-serandite series. American Mineralogist, 40, 10221031.Google Scholar
Sheldrick, G.M. (1997) SHELXS-97 and SHELXL-97, Program for Crystal Structure Solution and Refinement. University of Gottingen, Gottingen, Germany.Google Scholar
Sheldrick, G.M. (2008) CELL_NOW. Version 2008/4. Georg-August-Universität Göttingen, Göttingen, Germany.Google Scholar
Sheldrick, G.M. (2015) SHELXL Version 2014. Acta Crystalographica, C71, 38.Google Scholar
Winther, C. (1901) Schizolite, a new mineral. Meddelelser om Grønland, 24, 196203.Google Scholar
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