tokyoite
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Tokyoite is a rare barium manganese vanadate mineral with the chemical formula: Ba2(Mn3+,Fe3+)OH(VO4)2. It is the manganese analogue of the iron rich gamagarite and the barium analogue of the lead vanadate, brackebuschite.
Key facts
- Mineral.name
- Tokyoite
- Mineral.category
- Vanadate mineral
- Mineral.image
- Tokyoite displayed at Mining Museum of Akita University.jpg
- Mineral.imagesize
- 250
- Mineral.caption
- Tokyoite ore displayed at the Mining Museum of Akita University, Japan
- Mineral.formula
- Ba2(Mn3+,Fe3+)OH(VO4)2
- Mineral.IMAsymbol
- Tky
- Mineral.strunz
- 8.BG.05
- Mineral.system
- Monoclinic
- Mineral.class
- Prismatic (2/m) (same H-M symbol)
- Mineral.unit cell
- a = 9.104 Å, b = 6.132 Å c = 7.895 Å; β = 112.2°; Z = 2
- Mineral.color
- Reddish black
- Mineral.habit
- Occurs as splotchy, anhedral crystals forming inclusions
- Mineral.cleavage
- None observed
- Mineral.mohs
- 4.5 - 5
- Mineral.luster
- Vitreous
- Mineral.streak
- Deep brownish red
- Mineral.diaphaneity
- Translucent
via Wikipedia infobox
Wikidata facts
- Image
- Tokyoite displayed at Mining Museum of Akita University.jpg
Show 5 more facts
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 8.BG.05
- Nickel-Strunz 9th edition (updated 2009)
- 8.BG.05
- Commons category
- Tokyoite
- IMA Mineral Symbol
- Tky
- chemical formula
- Ba₂Mn³⁺(VO₄)₂(OH)
Sources (1)
via Wikidata · CC0
~1 min read
Article
1 sectionsContents
- References
Tokyoite is a rare barium manganese vanadate mineral with the chemical formula: Ba2(Mn3+,Fe3+)OH(VO4)2. It is the manganese analogue of the iron rich gamagarite and the barium analogue of the lead vanadate, brackebuschite.
It occurs in low-grade metamorphosed sedimentary manganese ore deposits associated with hyalophane, braunite and tamaite.
Connections
Japan
Country
Italy
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Tokyo
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manganese
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barium
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mineral
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Honshu
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ångström
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ore
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transparency
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cleavage
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birefringence
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metamorphism
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