Hercynite is a spinel mineral with the formula FeAl 2 O 4.. It occurs in high-grade metamorphosed iron rich argillaceous sediments as well as in mafic and ultramafic igneous rocks.Due to its hardness it also is found in placers.. It was first described in 1847 and its name originates from the Latin name for the Harz, Silva Hercynia, where the species was first found.
Hercynite, the mineral iron aluminum oxide, a member of the spinel (q.v.)
A mixed cobalt ferrite-hercynite system (CoFe 2 O 4 /FeAl 2 O 4) has been proposed by the University of Colorado (United States) as a potential redox cycle .The hercynite is produced due to the reaction between CoFe 2 O 4 and its support material, Al 2 O 3.The overall reactions for H 2 O splitting can be summarized as:
Maruyama, S., Kunihiro, T., Nakamura, E. (2008) A hercynite-rich inclusion in the Vigarano CV3 chondrite. 71st Annual Meeting of the Meteoritical Society, held July 28-August 1, 2008 in Matsue, Japan.
Hercynite definition: a black, opaque mineral of the spinel series | Meaning, pronunciation, translations and examples
Hercynite definition, a black oxide mineral, FeAl2O4, of the spinel group. See more.
General Hercynite Information : Chemical Formula: Fe++Al2O4 : Composition: Molecular Weight = 173.81 gm Aluminum 31.05 % Al 58.66 % Al 2 O 3: Iron 32.13 % Fe 41.34 % FeO: Oxygen 36.82 % O: 100.00 % 100.00 % = TOTAL OXIDE
Hercynite - FeAl 2 O 4 Hercynite occurs in high-grade metamorphosed iron rich argillaceous sediments as well as in mafic and ultramafic igneous rocks. Due to its hardness it also is found in placers. It was first described in 1847 and its name originates from the Latin name for the Harz, Silva Hercynia, where the species was first found. ...
Hercynite-Spinel Series mineral data, information about Hercynite-Spinel Series, its properties and worldwide locations.
Hercynite is a new addition to the suite of MSH minerals. PHYSICAL CHARACTERISTICS: Color is usually black. Luster is vitreous. Diaphaneity is opaque. Crystal System is isometric; Fd Crystal Habits include octahedral embedded crystals. Cleavage (??). Fracture is (??). Hardness is 7.5 – 8.