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Schmidite and wildenauerite, two new schoonerite-group minerals from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria

Published online by Cambridge University Press:  29 June 2018

Ian E. Grey ,
Erich Keck ,
Anthony R. Kampf ,
John D. Cashion ,
Colin M. MacRae ,
Alexander M. Glenn  and
Yesim Gozukara
Ian E. Grey*
Affiliation:
CSIRO Mineral Resources, Private Bag 10, Clayton South, Victoria 3169, Australia
Erich Keck
Affiliation:
Algunderweg 3, D-92694 Etzenricht, Germany
Anthony R. Kampf
Affiliation:
Mineral Sciences Department, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA
John D. Cashion
Affiliation:
Monash University, School of Physics and Astronomy, Victoria 3800, Australia
Colin M. MacRae
Affiliation:
CSIRO Mineral Resources, Private Bag 10, Clayton South, Victoria 3169, Australia
Alexander M. Glenn
Affiliation:
CSIRO Mineral Resources, Private Bag 10, Clayton South, Victoria 3169, Australia
Yesim Gozukara
Affiliation:
CSIRO Manufacturing, Private Bag 10, Clayton South, Victoria 3169, Australia
*
*Author for correspondence: Ian Grey, Email: Ian.Grey@csiro.au
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Abstract

Schmidite, Zn(Fe3+0.5Mn2+0.5)2ZnFe3+(PO4)3(OH)3(H2O)8 and wildenauerite, Zn(Fe3+0.5Mn2+0.5)2Mn2+Fe3+(PO4)3(OH)3(H2O)8 are two new oxidised schoonerite-group minerals from the Hagendorf-Süd pegmatite, Hagendorf, Oberpfalz, Bavaria, Germany. Schmidite occurs as radiating sprays of orange–brown to copper-red laths on and near to altered phosphophyllite in a corroded triphylite nodule, whereas wildenauerite forms dense compacts of red laths, terminating Zn-bearing rockbridgeite. The minerals are biaxial (+) with α = 1.642(2), β = 1.680(1), γ = 1.735(2) and 2Vmeas = 81.4(8)° for schmidite, and with α = 1.659(3), β = 1.687(3), γ = 1.742(3) and 2Vmeas = 73(1)° for wildenauerite. Electron microprobe analyses, with H2O from thermal analysis and FeO/Fe2O3 from Mössbauer spectroscopy, gave FeO 0.4, MgO 0.3, Fe2O3 23.5, MnO 9.0, ZnO 15.5, P2O5 27.6, H2O 23.3, total 99.6 wt.% for schmidite, and FeO 0.7, MgO 0.3, Fe2O3 25.2, MnO 10.7, ZnO 11.5, P2O5 27.2, H2O 24.5, total 100.1 wt.% for wildenauerite. The empirical formulae, scaled to 3 P and with OH– adjusted for charge balance are Zn1.47Mn2+0.98Mg0.05Fe2+0.04Fe3+2.27(PO4)3(OH)2.89(H2O)8.54 for schmidite and Zn1.11Mn2+1.18Mg0.05Fe2+0.08Fe3+2.47(PO4)3(OH)3.25(H2O)9.03 for wildenauerite. The two minerals have orthorhombic symmetry, space group Pmab and Z = 4. The unit-cell parameters from refinement of powder X-ray diffraction data are a = 11.059(1), b = 25.452(1) and c = 6.427(1) Å for schmidite, and a = 11.082(1), b = 25.498(2) and c = 6.436(1) Å for wildenauerite. The crystal structures of schmidite and wildenauerite differ from that of schoonerite in having minor partitioning of Zn from the [5]Zn site to an adjacent vacant tetrahedral site [4]Zn, separated by ~1.0 Å from [5]Zn. The two minerals are distinguished by the cation occupancies in the octahedral M1 to M3 sites. Schmidite has M1 = M2 = (Fe3+0.5Mn2+0.5) and M3 = Zn and wildenauerite has M1 = M2 = (Fe3+0.5Mn2+0.5) and M3 = Mn2+.

Keywords

schmiditewildenaueriteschoonerite-group mineralHagendorf-Süd pegmatiteOberpfalzBavaria
Type
Article
Information
Mineralogical Magazine , Volume 83 , Issue 2 , April 2019 , pp. 181 - 190
Copyright
Copyright © Mineralogical Society of Great Britain and Ireland 2018 

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Footnotes

Associate Editor: Michael Rumsey

References

Brown, I.D. and Altermatt, D. (1985) Bond-valence parameters from a systematic analysis of the inorganic crystal structure database. Acta Crystallographica, B41, 244–247.Google Scholar
Farrugia, L.J. (1999) WinGX suite for small-molecule single-crystal crystallography. Journal of Applied Crystallography, 32, 837–838.Google Scholar
Grey, I.E., Keck, E., Mumme, W.G., Pring, A. and MacRae, C.M. (2015) Flurlite, Zn3Mn2+Fe3+(PO4)3(OH)2·9H2O, a new mineral from the Hagendorf Süd pegmatite, Bavaria, with a schoonerite-related structure. Mineralogical Magazine, 79, 1175–1184.Google Scholar
Grey, I.E., Keck, E., Kampf, A.R., MacRae, C.M. and Cashion, J.D. (2017 a) A proposal for a schoonerite group and its nomenclature. CNMNC Newsletter No. 40, December 2017, page 1581; Mineralogical Magazine, 81, 1577–1581.Google Scholar
Grey, I.E., Keck, E., Kampf, A.R., MacRae, C.M., Glenn, A.M. and Price, J.R. (2017 b) Wilhelmgümbelite, [ZnFe2+Fe3+3(PO4)3(OH)4(H2O)5]·2H2O, a new schoonerite-related mineral from the Hagendorf Süd pegmatite, Bavaria. Mineralogical Magazine, 81, 287–296.Google Scholar
Grey, I.E., Keck, E., Kampf, A.R., MacRae, C.M., Glenn, A.M., Cashion, J. and Gozukara, Y. (2017 c) Schmidite, IMA 2017-012.CNMNC Newsletter No. 37, June 2017, page741; Mineralogical Magazine, 81, 737–742.Google Scholar
Grey, I.E., Keck, E., Kampf, A.R., MacRae, C.M., Cashion, J.D., Glenn, A.M., Davidson, C.J. and Gozukara, Y. (2017 d) Wildenauerite, IMA 2017-058. CNMNC Newsletter No. 39, October 2017, page 1284; Mineralogical Magazine, 81, 1279–1286.Google Scholar
Grey, I.E., Kampf, A.R., Keck, E., MacRae, C.M., Cashion, J.D. and Gozukara, Y. (2018) Crystal chemistry of schoonerite-group minerals. European Journal of Mineralogy, 30, 621–634Google 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 how to build a spindle stage. The Microscope, 52, 23–39.Google Scholar
Hatert, F. and Burke, E.A.J. (2008) The IMA-CNMNC dominant-constituent rule revisited and extended. The Canadian Mineralogist, 46, 717–728.Google Scholar
Kampf, A.R. (1977) Schoonerite: its atomic arrangement. American Mineralogist, 62, 250–255.Google Scholar
Kampf, A.R., Grey, I.E., MacRae, C.M. and Keck, E. (2017) Manganflurlite, IMA 2017–076. CNMNC Newsletter No. 40, December 2017, page 1580; Mineralogical Magazine, 81, 1577–1581.Google 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
Moore, P.B. and Kampf, A.R. (1977) Schoonerite, a new zinc-manganese-iron phosphate mineral. American Mineralogist, 62, 246–249.Google Scholar
Mücke, A., (1981) The paragenesis of the phosphate minerals of the Hagendorf pegmatite – a general view: Chemie der Erde, 40, 217–234.Google Scholar
Petříček, V., Dušek, M. and Palatinus, L. (2014) Crystallographic Computing System JANA2006: General features. Zeitschrift für Kristallographie, 229, 345–352.Google Scholar
Rodríguez-Carvajal, J. (2001) Recent Developments of the Program FULLPROF. Commission on Powder Diffraction (IUCr) Newsletter (2001), 26, 12–19.Google Scholar
Schmid, H. (1955) Verbandsverhältnisse der Pegmatite des Oberpfälzer und Bayerischen Waldes (Hagendorf-Pleystein-Hühnerkobel). Neues Jahrbuch für Mineralogie – Abhandlungen, 309–404.Google Scholar
Sheldrick, G.M. (2008) A short history of SHELX. Acta Crystallographica, A64, 112–122.Google Scholar
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