Abelsonite description and its diagnostic

ABELSONITE IS SEMITRANSPARENT AND PINK-PURPLE, DARK GREYISH PURPLE, PALE PURPLISH RED, OR REDDISH BROWN IN COLOR

Abelsonite is semitransparent and pink-purple, dark greyish purple, pale purplish red, or reddish brown in color

Associated authigenic minerals include orthoclase, pyrite, quartz, dolomite, analcime, and a K--Fe micaceous mineral
Associated authigenic minerals include orthoclase, pyrite, quartz, dolomite, analcime, and a K--Fe micaceous mineral

Abelsonite is semitransparent and pink-purple, dark greyish purple, pale purplish red, or reddish brown in color. The mineral occurs as thin laths or plates or small aggregates up to 1 cm. The mineral is soluble in benzene and acetone and is insoluble in water, dilute hydrochloric acid, and dilute nitric acid. 

Associated authigenic Minerals include orthoclase, pyrite, quartz, dolomite, analcime, and a K--Fe micaceous mineral. Abelsonite occurs as aggregates of platy crystals, as much as 3 mm long, that range in color from pink-purple to dark reddish-brown. As of 1989, abelsonite was the only the known geoporphyrin to have a crystalline structure. 

Most geoporphyrins occur as a series of homologues spanning a large range of carbon numbers. The porphyrin which comprises abelsonite is common, but it does not usually occur in isolation from other porphyrins. The mineral is a deoxophylloerythroetioporphyrin (DPEP), with nickel occupying the center of the porphyrin ring. 

Most of the mineral consists of a C31 porphyrin with small quantities of a C30 norisomer. The mineral crystallizes in the triclinic crystal system.

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