AEGIRINE (ACMITE), MOUNT MALOSA, ZOMBA, MALAWI

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AEGIRINE (ACMITE), MOUNT MALOSA, ZOMBA, MALAWI

647-04

$265.00

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Aegirine (until 1988 named ACMITE) belongs to the clinopyroxene group of inosilicate minerals and serves as the sodium endmember of the aegirineâ€“augite series. Its chemical composition is represented by the formula NaFeSi2O6, where iron exists as the Fe3+ ion. Within the aegirineâ€“augite series, sodium can be partially substituted by calcium, while iron(II) and magnesium can replace iron(III) to maintain charge balance. Additionally, aluminum can substitute for iron(III). A notable variety of this mineral is acmite, which is characterized by its fibrous green appearance.

Â Aegirine typically forms dark green monoclinic prismatic crystals, exhibiting a glassy luster and perfect cleavage. Its hardness on the Mohs scale ranges from 5 to 6, and it has a specific gravity that falls between 3.2 and 3.4.

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