The type specimen of igelströmite showing a black aggregate of lenticular, parallel-grown igelströmite crystals on blackish globular “serpentine”, with associated yellow nadorite and greyish-colourless aggregates of lead-bearing rhodochrosite. Field of view is ca. 4 × 3 mm. GEO-NRM 19255056. Photo: Torbjörn Lorin. — Photo: Torbjörn Lorin · CC BY 4.0
Igelströmite
Igelströmite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Fe³⁺(SbPb)O₄.
It crystallizes in the tetragonal crystal system (space group P4_2/mbc). It is a member of the Trippkeite structural group.
IMA status: approved, named in 2021.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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