Hercynite

Image

Hercynite specimen from In den Dellen quarries, Niedermendig, Mendig, Laach lake volcanic complex, Eifel, Rhineland-Palatinate, Germany, Image width: 5 mm.

© Image by Fred Kruijen (via Wikimedia Commons), CC-BY-SA-3.0-NL

Properties

Formula FeIIAl2O4
Abbreviation Hc, Hc
Variant syn
Classification Spinel (subgroup)
IMA Status Grandfathered (pre-IMA), 1839
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Crystal symmetry Cubic, Point group m3m, Space group Fd3m (#227)
Tags Mineral, Synthetic

Composition

Element Atoms
Fe 1
Al 2
O 4
Total: 7