Orange-brown crystals of the extremely rare new mineral wilhelmgumbelite (IMA 2015-072 and published in 2017), from the type and only known locality worldwide in Hagendorf mine (Hagendorf, Oberpfalz, Bavaria, Germany), in a matrix of mitridatite. Willhelmgumbelite is a Zn-Fe phosphate. Specimen analyzed by SEM. — Photo: David Hospital · CC BY-SA 4.0
Wilhelmgümbelite
Wilhelmgümbelite is an IMA-recognized mineral species in the phosphate class, with the chemical formula [ZnFe²⁺Fe³⁺₃(PO₄)₃(OH)₄(H₂O)₅]·2H₂O.
It crystallizes in the orthorhombic crystal system (space group Pmab). It is a member of the Calcioferrite-Schoonerite structural group.
IMA symbol Wgü, IMA status: approved, named in 2015.
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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