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Mineral Reference Lookup for GAHNITE

This reference page contains mineralogic data for GAHNITE and folklore and metaphysical beliefs. If the mineral is an alternate naming of a more common name, the more common mineral's data is displayed below the list of synonyms.

Minerals matching GAHNITE in the database: GAHNITE   Gahnite (of von Moll)  

Mineralogical Reference

GAHNITE
MineralGAHNITE
ChemistryZnAl 2 O 4
ColorDark blue -Green Yellow brown black
LusterVitreous
CrystalSystemIsometric
CrystalHabitsinclude the typical octahedron, but can be foundas dodecahedrons and cubes. Octahedrons may be truncated by dodecahedral faces and commonly show striations parallel to the octahedron-dodecahedron boundary.Twinning by the Spinel Twin Law can produce trigonal appearing crystals with three reentrant angles on the sides of the crystal.
Hardness7½ - 8
Occurencesinclude Rowe and Charlemont, Massachusetts; Spruce Pine, North Carolina; White Picacho district, Arizona; Topsham, Maineand Franklin New Jersey, USA and Falun, Sweden.
Indicatorscrystal habit, color, hardness, densityand locality.
IMAStatusApproved
Discovered1807
CellParametersa = 8.08
OpticalTypeIsotropic
SynonymsAutomat Automata Automate Automot Automota Automote Fahlunite (of Karsten) Gahnit Gahnita Gahnite (of von Moll) Zinc-spinel Zinkspinell
TypeLocalityFalu mine Falun Dalarna Sweden
Strunz4/B.01-40 4 : Oxides & Hydroxides B : Oxides with metal : oxygen = 3:4 (spinel type M3O4 and related)Alumina-Spinels 01 : Spinel groupSpinel - Gahnite series
CHARPND_011
OBATSPC_062
AVPEBD_083
CITTUM_140
QZCLTUM_166
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