Petscheckite
Petscheckite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula U⁴⁺Fe²⁺Nb₂O₈.
It crystallizes in the hexagonal crystal system (space group P-31m).
Key properties: Mohs hardness 5; specific gravity 7; Brownish black streak; Metallic luster.
IMA symbol Psk, IMA status: approved, named in 1975.
An accessory mineral in a zoned pegmatite.
It is found associated with Magnetite, columbite, liandratite, pyrochlore, strüverite, monazite, ilmenite, garnet, tourmaline, beryl, quartz, feldspar.
The mineral was named to honor Eckehard Petsch, of Idar-Oberstein, Germany, who prospected extensively in Madagascar.
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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