Microphotograph in polarised light of a thin section with poikiloblastic hiärneite (orange) and magnetoplumbite/jacobsite (opaque) in a fine-grained phlogopite matrix. Field of view = 1 mm width. Specimen GEO-NRM #19920776. — Photo: Dan Holtstam and Luca Bindi · CC BY 4.0
Hiärneite
The first mineral known to contain both antimony and zirconium — an oxide in phlogopite-rich rocks, named for geologist Urban Hiärne.
Intro adapted from Wikipedia (CC BY-SA).
Hiärneite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Ca₂Zr₄Mn³⁺SbTiO₁₆.
It crystallizes in the tetragonal crystal system (space group I4_1/acd). It is a member of the Calzirtite structural group.
IMA symbol Hiä, IMA status: approved, named in 1996.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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