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franklinite
Sign in to saveFranklinite is an oxide mineral belonging to the normal spinel subgroup's iron (Fe) series, with the formula ZnFe3+2O4.
Key facts
- Mineral.name
- Franklinite
- Mineral.image
- Franklinite-Willemite-Zincite-103826.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- Franklinite (black) with Zincite (red)
- Mineral.category
- Oxide minerals Spinel group Spinel structural group
- Mineral.formula
- ZnFe2O4
- Mineral.IMAsymbol
- Frk
- Mineral.strunz
- 4.BB.05
- Mineral.system
- Cubic
- Mineral.class
- Hexoctahedral (mm) H-M symbol: (4/m 2/m)
- Mineral.symmetry
- Fdm
- Mineral.color
- black
- Mineral.habit
- octahedral
- Mineral.cleavage
- None; indistinct octahedral parting in four directions
- Mineral.fracture
- irregular/uneven, conchoidal
- Mineral.tenacity
- Brittle
- Mineral.mohs
- 5.5–6
- Mineral.luster
- metallic, often dull
via Wikipedia infobox
Wikidata facts
- Image
- Franklinit mit Zinkit - Franklin, New Jersey, USA.jpg
Show 6 more facts
- IMA Mineral Symbol
- Frk
- Strunz 8th edition (series ID, updated)
- IV/B.01b
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 4.BB.05
- Commons category
- Franklinite
- chemical formula
- ZnFe³⁺₂O₄
- Nickel-Strunz 9th edition (updated 2009)
- 4.BB.05
Sources (1)
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- External links
Franklinite is an oxide mineral belonging to the normal spinel subgroup's iron (Fe) series, with the formula ZnFe3+2O4.
As with another spinel member magnetite, both ferrous (2+) and ferric (3+) iron may be present in Franklinite samples. Divalent iron and/or manganese (Mn) may commonly accompany zinc (Zn) and trivalent manganese may substitute for some ferric iron.
Gallery (2)
Connections
fluorescence
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oxide class of minerals
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iron
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New Jersey
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zinc
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International Standard Book Number
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manganese
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ultraviolet radiation
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digital object identifier
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sulfuric acid
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chemical formula
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Mohs scale of mineral hardness
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calcite
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solubility
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magnetite
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bibcode
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spinel
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transparency
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cleavage
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crystal system
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