Articles | Volume 37, issue 2
https://doi.org/10.5194/ejm-37-269-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ejm-37-269-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
23 Apr 2025
Research article |
| 23 Apr 2025
| 23 Apr 2025
Skogbyite, Zr(Mg2Mn3+4)SiO12, a new zirconium mineral in the braunite group from Långban, Bergslagen, Sweden
Erik Jonsson
CORRESPONDING AUTHOR
Department of Mineral Resources, Geological Survey of Sweden, 751 28 Uppsala, Sweden
Mineralogy, Petrology and Tectonics, Department of Earth Sciences, Uppsala University, 752 36 Uppsala, Sweden
Ulf Hålenius
Department of Geosciences, Swedish Museum of Natural History, 104 05 Stockholm, Sweden
Jaroslaw Majka
Mineralogy, Petrology and Tectonics, Department of Earth Sciences, Uppsala University, 752 36 Uppsala, Sweden
Faculty of Geology, Geophysics and Environmental Protection, AGH University of Krakow, 30-059 Kraków, Poland
Ferdinando Bosi
Dipartimento di Scienze della Terra, Sapienza Università di Roma, 00185 Rome, Italy
CNR-IGAG c/o Dipartimento di Scienze della Terra, Sapienza Università di Roma, 00185 Rome, Italy
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Ferdinando Bosi, Ritsuro Miyawaki, Frédéric Hatert, Marco Pasero, and Stuart J. Mills
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Zinkgruvanite, a barium manganese iron silicate with sulfate, is a new mineral found in drill core samples from the Zinkgruvan zinc, lead and silver mine in Sweden. It is associated with other minerals like baryte, barytocalcite, diopside and sulfide minerals. It occurs as flattened and elongated crystals up to 1 mm. It is almost black. Zinkgruvanite is closely related to the mineral yoshimuraite and based on its crystal structure, grouped with the ericssonite group of minerals.
Cited articles
Allen, R. L, Lundström, I., Ripa, M., and Christofferson, H.: Facies analysis of a 1.9 Ga, continental margin, back-arc, felsic caldera province with diverse Zn-Pb-Ag-(Cu-Au) sulfide and Fe oxide deposits, Bergslagen region, Sweden, Econ. Geol., 91, 979–1008, https://https://doi.org/10.2113/gsecongeo.91.6.979, 1996.
Armstrong, J. T.: CITZAF: a package of correction programs for the quantitative electron microbeam X-ray analysis of thick polished materials, thin films, and particles, Microbeam. Anal., 4, 177–200, 1995.
Christy, A. and Gatedal, K.: Extremely Pb-rich rock-forming silicates including a beryllian scapolite and associated minerals in a skarn from Långban, Värmland, Sweden, Mineral. Mag., 69, 995–1018, doi.org./10.1180/0026461056960304, 2005.
Chukanov, N. V.: Infrared spectra of mineral species. Extended library. Vol. 1, Springer Dordrecht Heidelberg New York London, 1–1726, https://doi.org/10.1007/978-94-007-7128-4, 2014.
Gagné, O. C. and Hawthorne, F. C.: Comprehensive derivation of bond- valence parameters for ion pairs involving oxygen, Acta Crystallogr. B, 71, 562–578, https://doi.org/10.1107/S2052520615016297, 2015.
Hålenius, U. and Bosi, F.: Gatedalite, Zr(Mn
Holtstam, D.: Hiärneite, a new, Zr-Sb oxide mineral isostructural with calzirtite, from Långban, Sweden, Eur. J. Mineral., 9, 843–848, https://doi.org/10.1127/ejm/9/4/0843, 1997.
Holtstam, D. and Mansfeld, J.: Origin of a carbonate-hosted Fe-Mn-(Ba-As-Pb-Sb-W) deposit of Långban-type in central Sweden, Mineral. Dep., 36, 641–657, https://doi.org/10.1007/s001260100183, 2001.
Holtstam, D., Langhof, J., Friis, H., Karlsson, A., and Erambert, M.: Igelströmite, Fe3+(Sb3+Pb2+)O4, and manganoschafarzikite, Mn2+Sb
Jonsson, E.: Fissure-hosted mineral formation and metallogenesis in the Långban Fe-Mn-(Ba-As-Pb-Sb…) deposit, Sweden, Medd. Stockh. Univers. Inst. Geol. Geok., 318, 1–110, 2004.
Jonsson, E., Hålenius, U., Majka, J., and Bosi, F.: Skogbyite, IMA 2023-085, in: CNMNC Newsletter 77, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-165-2024, 2024.
Jonsson, E. and Broman, C.: Fluid inclusions in late-stage Pb-Mn-As-Sb mineral assemblages in the Långban deposit, Bergslagen, Sweden, Can. Mineral., 40, 47–65, https://doi.org/10.2113/gscanmin.40.1.47, 2002.
Jonsson, E. and Billström, K.: Lead isotope systematics in the Långban deposit and adjacent sulphide mineralisations in western Bergslagen, Sweden, GFF, 131, 215–227, https://doi.org/10.1080/11035890903189751, 2009.
Lafuente, B., Downs, R. T., Yang, H., and Stone, N.: The power of databases: the RRUFF project, in: Highlights in Mineralogical Crystallography, edited by: Armbruster, T. and Danisi, R. M., Berlin, Germany, Walter De Gruyter, 1–30, https://doi.org/10.1515/9783110417104-003, 2015.
Langhof, J. and Österberg, T.: Långban's mining history, in: Långban. The mine, its minerals, geology and explorers, edited by: Holtstam, D. and Langhof, J., Raster Förlag and the Swedish Museum of Natural History, Stockholm, 51–63, ISBN 91-87214-881, 1999.
Momma, K. and Izumi F.: VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data, J. Appl. Crystallogr., 44, 1272–1276, https://doi.org/10.1107/S0021889811038970, 2011.
Moore, P. B.: Mineralogy & chemistry of Långban-type deposits in Bergslagen, Sweden, Mineral. Rec., 1, 154–172, 1970.
Moore, P. B. and Araki, T.: Braunite: its structure and relationship to bixbyite and some insights on the genealogy of fluorite derivative structures, Am. Mineral, 61, 1226–1240, 1976.
Nysten, P., Holtstam, D., and Jonsson, E.: The Långban minerals, in: Långban. The mine, its minerals, geology and explorers, edited by: Holtstam, D. and Langhof, J., Raster Förlag and the Swedish Museum of Natural History, Stockholm, 89–183, ISBN 91-87214-881, 1999.
Sheldrick, G. M.: Crystal structure refinement with SHELXL, Acta Crystallogr., C71, 3–8, https://doi.org/10.1107/S2053229614024218, 2015.
Stephens, M. B., Ripa, M., Lundström, I., Persson, L., Bergman, T., Ahl, M., Wahlgren, C.-H., Persson, P. O., and Wickström, L.: Synthesis of the bedrock geology in the Bergslagen region, Fennoscandian Shield, south-central Sweden, Geological Survey of Sweden, Ba58, 259 pp., ISBN 978-91-7158-883-8, 2009.
Wright, S. E., Foley, J. A., and Hughes, J. M.: Optimization of site occupancies in minerals using quadratic programming, Am. Mineral., 85, 524–531, https://doi.org/10.2138/am-2000-0414, 2000.
Short summary
Skogbyite, with the chemical formula Zr(Mg2+2Mn3+4)SiO12, is a new species in the braunite group of minerals. It was discovered in a complex mineral assemblage, essentially a very poor manganese ore, from the Långban Fe–Mn oxide deposit, Värmland County, Bergslagen ore province, Sweden. It is named after the Swedish mineralogist Henrik Skogby (b. 1956). It is a new mineral attesting to the localised mobility and reactivity of zirconium under very special geological conditions.
Skogbyite, with the chemical formula Zr(Mg2+2Mn3+4)SiO12, is a new species in the braunite group...
