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abelsonite

n. A mineral, NiC31H32N4, forming soft reddish-brown triclinic crystals.

Wikipedia
Abelsonite

Abelsonite is a nickel porphyrin mineral with chemical formula CHNNi. It was discovered in 1969 in the U.S. State of Utah and described in 1975. The mineral is named after geochemist Philip H. Abelson. It is the only known crystalline geoporphyrin.