Articles | Volume 36, issue 1
https://doi.org/10.5194/ejm-36-87-2024
https://doi.org/10.5194/ejm-36-87-2024
Research article
 | 
17 Jan 2024
Research article |  | 17 Jan 2024

OxyEMG: an application for determination of the oxyspinel group end-members based on electron microprobe analyses

Gabriela R. Ferracutti, Lucía M. Asiain, Antonella S. Antonini, Juan E. Tanzola, and M. Luján Ganuza

Related subject area

New minerals and systematic mineralogy
Rotherkopfite, KNa2(Fe2+2.5Ti4+1.5)Fe2+(Si4O12)2, a new neptunite-group mineral without essential lithium, from Rother Kopf, Eifel volcanic fields, Germany
Anthony R. Kampf, Gerhard Möhn, Chi Ma, George R. Rossman, Joy Désor, and Yunbin Guan
Eur. J. Mineral., 36, 605–614, https://doi.org/10.5194/ejm-36-605-2024,https://doi.org/10.5194/ejm-36-605-2024, 2024
Short summary
Zvěstovite-(Fe), Ag6(Ag4Fe2)As4S13, a new member of the tetrahedrite group from the Ulatayskoe Ag–Cu–Co occurrence, eastern Siberia, Russia
Cristian Biagioni, Anatoly V. Kasatkin, Fabrizio Nestola, Radek Škoda, Vladislav V. Gurzhiy, Atali A. Agakhanov, and Natalia N. Koshlyakova
Eur. J. Mineral., 36, 529–540, https://doi.org/10.5194/ejm-36-529-2024,https://doi.org/10.5194/ejm-36-529-2024, 2024
Short summary
Fluor-rewitzerite, [(H2O)K]Mn2(Al2Ti)(PO4)4(OF)(H2O)10 ⋅ 4H2O, a new paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany
Rupert Hochleitner, Ian E. Grey, Anthony R. Kampf, Stephanie Boer, Colin M. MacRae, William G. Mumme, and Nicholas C. Wilson
Eur. J. Mineral., 36, 541–554, https://doi.org/10.5194/ejm-36-541-2024,https://doi.org/10.5194/ejm-36-541-2024, 2024
Short summary
Kenoargentotetrahedrite-(Zn), [Ag6]4+(Cu4Zn2)Sb4S12□, a new member of the tetrahedrite group from the Yindongpo Au deposit, China
Kai Qu, Xianzhang Sima, Xiangping Gu, Weizhi Sun, Guang Fan, Zeqiang Yang, and Yanjuan Wang
Eur. J. Mineral., 36, 397–409, https://doi.org/10.5194/ejm-36-397-2024,https://doi.org/10.5194/ejm-36-397-2024, 2024
Short summary
Igelströmite, Fe3+(Sb3+Pb2+)O4, and manganoschafarzikite, Mn2+Sb3+2O4, two new members of the newly established minium group, from the Långban Mn–Fe deposit, Värmland, Sweden
Dan Holtstam, Jörgen Langhof, Henrik Friis, Andreas Karlsson, and Muriel Erambert
Eur. J. Mineral., 36, 311–322, https://doi.org/10.5194/ejm-36-311-2024,https://doi.org/10.5194/ejm-36-311-2024, 2024
Short summary

Cited articles

Antao, S. M., Cruickshank, L. A., and Hazrah, K. S.: Structural Trends and Solid-Solutions Based on the Crystal Chemistry of Two Hausmannite (Mn3O4) Samples from the Kalahari Manganese Field, Minerals, 9, 343, https://doi.org/10.3390/min9060343, 2019. 
Anthony, J. W., Bideaux, R. A., Bladh, K. W., and Nichols, M. C.: Handbook of Mineralogy, Mineralogical Society of America, Chantilly, USA, http://www.handbookofmineralogy.org/ (last access: 11 September 2023), 2001–2005. 
Bjerg, E. A., de Brodtkorb, M., and Stumpfl, E. F.: Compositional zoning in Zn-chromites from the Cordillera Frontal Range, Argentina, Mineral. Mag., 57, 131–139, https://doi.org/10.1180/minmag.1993.057.386.13, 1993. 
Bosi, F., Lucchesi, S., and Della Giusta, A.: Structural relationships in (Mn1−xZnx)Mn2O4 (0 x 0.26): The “dragging effect” of the tetrahedron on the octahedron, Am. Mineral., 87, 1121–1127, https://doi.org/10.2138/am-2002-8-909, 2002. 
Bosi, F., Hålenius, U., Andreozzi, G. B., Skogby, H., and Lucchesi, S.: Structural refinement and crystal chemistry of Mn-doped spinel: A case for tetrahedrally coordinated Mn3+ in an oxygen-based structure, Am. Mineral., 92, 27–33, https://doi.org/10.2138/am.2007.2266, 2007. 
Download
Short summary
The paper proposes an application called OxyEMG (Oxyspinel group End-Member Generator), which is an improved version of EMG. This tool allows for calculating the portions of 31 end-members of the oxyspinel group from data obtained with an electron microprobe. This is fundamental since this group of minerals is considered to be tectonic tracers; their integral composition should be taken into account and not only those end-members that make up the magnetite or ulvöspinel prisms.