Kullerudite
Kullerudite is an IMA-recognized mineral species in the sulfide class, with the chemical formula NiSe₂.
It crystallizes in the orthorhombic crystal system (space group Pnnm). It is a member of the Marcasite structural group.
Key properties: specific gravity 6.72.
IMA symbol Krd, IMA status: approved, named in 1964.
Found in calcite veins in sills of albite diabase in schist, in association with low-grade uranium mineralization, almost exclusively as an alteration product of wilkmanite.
It is found associated with Wilkmanite, sederholmite, penroseite, selenium, ferroselite.
In honor of Gunnar Kullerud (1921–1989), Norwegian-American mineralogist, Geophysical Laboratory, Washington, D.C., USA.
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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