| Reference Type | Journal (article/letter/editorial) |
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| Title | 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 |
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| Journal | European Journal of Mineralogy |
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| Authors | Holtstam, Dan | Author |
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| Langhof, Jörgen | Author |
| Friis, Henrik | Author |
| Karlsson, Andreas | Author |
| Erambert, Muriel | Author |
| Year | 2024 (March 25) | Volume | 36 |
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| Page(s) | 311-322 | Issue | 2 |
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| Publisher | Copernicus GmbH |
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| URL | |
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| DOI | doi:10.5194/ejm-36-311-2024Search in ResearchGate |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 18583448 | Long-form Identifier | mindat:1:5:18583448:7 |
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| GUID | 0 |
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| Full Reference | Holtstam, Dan; Langhof, Jörgen; Friis, Henrik; Karlsson, Andreas; Erambert, Muriel (2024) 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. European Journal of Mineralogy, 36 (2). 311-322 doi:10.5194/ejm-36-311-2024 |
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| Plain Text | Holtstam, Dan; Langhof, Jörgen; Friis, Henrik; Karlsson, Andreas; Erambert, Muriel (2024) 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. European Journal of Mineralogy, 36 (2). 311-322 doi:10.5194/ejm-36-311-2024 |
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| In | (2024) European Journal of Mineralogy Vol. 36 (2). Schweizerbart |
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| Abstract/Notes | Abstract. The two new minerals igelströmite, Fe3+(Sb3+Pb2+)O4, and manganoschafarzikite, Mn2+Sb23+O4, are found in the Långban Fe–Mn deposit, in open fractures in a fine-grained hematite ore, with minor amounts of aegirine, a serpentine-group mineral, fluorcalcioroméite, baryte, nadorite, mimetite and other late-stage minerals. Igelströmite is named after the Swedish geologist–mineralogist Lars Johan Igelström (1822–1897). Mohs hardness = 3–4 and Dcalc= 6.33(1) and 5.37(2) g cm−3 for igelströmite and manganoschafarzikite, respectively. Cleavage is distinct on {110}. Both minerals are brittle, with an uneven to conchoidal fracture. The chemical formulae obtained from microprobe data are (Fe0.593+Mn0.292+As0.063+Fe0.062+)Σ=1.00(Sb1.243+Pb0.652+As0.113+)Σ=2.00O4 and (Mn0.642+Fe0.252+Mg0.08)Σ=0.97(Sb1.973+As0.033+Pb0.012+)Σ=2.01O4. The crystal structures for igelströmite and manganoschafarzikite have been refined in space group P42/mbc from single-crystal X-ray diffraction data to R1 = 3.73 % and 1.51 %, respectively, giving the following sets of unit-cell parameters: a= 8.4856(2), 8.65159(8) Å; c= 6.0450(3), 5.97175(9); and V= 435.27(3), 446.986(11) Å3 for Z = 4. Both minerals are isostructural with minium, Pb4+Pb22+O4, where Pb4+O6 forms distorted octahedra, which connect via trans-edges to form rutile-like ribbons along c. The Pb2+ atoms appear in trigonal, flattened PbO3 pyramids, which are linked via corners to form zigzag (PbO2)n chains. The minium group, of general formula MX2O4(X= As3+, Sb3+, Pb2+), presently consists of the minerals minium, trippkeite, schafarzikite, igelströmite and manganoschafarzikite. For future new members, it is recommended to consider the X cation content for the root name and add prefixes to indicate the dominant metal at the M position.
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