schoepite
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Schoepite, empirical formula (UO2)8O2(OH)12·12(H2O) is a rare alteration product of uraninite in hydrothermal uranium deposits. It may also form directly from ianthinite. The mineral presents as a transparent to translucent yellow, lemon yellow, brownish yellow, or amber orthorhombic tabular crystals. Although over 20 other crystal forms have been noted; rarely in microcrystalline aggregates. When exposed to air schoepite converts over a short time to the metaschoepite form (UO3·H2O, ) within a few months of being exposed to ambient air.
In the Vinony graph
Within Vinony's link graph, schoepite is referenced by 16 other articles, and connects out to Belgium, uranium and mineral.
It sits within the topics Minerals in space group 29, Orthorhombic minerals and Oxide minerals.
Its subject is documented across 14 Wikipedia language editions.
Key facts
- Mineral.name
- Schoepite
- Mineral.category
- Uranium minerals
- Mineral.image
- Schoepite-Rutherfordine-214963.jpg
- Mineral.imagesize
- 260
- Mineral.formula
- (UO2)8O2(OH)12 • 12(H2O)
- Mineral.IMAsymbol
- Sho
- Mineral.strunz
- 4.GA.05
- Mineral.system
- Orthorhombic
- Mineral.class
- Pyramidal (mm2) H-M symbol: (mm2)
- Mineral.symmetry
- P21ca
- Mineral.unit cell
- a = 14.33 Å, b = 16.79 Å c = 14.73 Å; Z = 4
- Mineral.color
- Amber, lemon- or sulfur yellow
- Mineral.habit
- Commonly as tabular equant, to short prismatic crystals; rarely in microcrystalline aggregates
- Mineral.cleavage
- [001] Perfect, [010] indistinct
- Mineral.tenacity
- Brittle
- Mineral.mohs
- 2.5
- Mineral.luster
- Adamantine
- Mineral.streak
- Yellow
via Wikipedia infobox
Wikidata facts
- Image
- Schoepite-Rutherfordine-214963.jpg
Show 10 more facts
- Nickel-Strunz 9th edition (updated 2009)
- 4.GA.05
- Commons category
- Schoepite
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 4.GA.05
- type locality (geology)
- Shinkolobwe mine
- streak color
- yellow
- crystal system
- orthorhombic crystal system
- Mohs' hardness
- 2.5
- IMA Mineral Symbol
- Sho
- chemical formula
- (UO₂)₈O₂(OH)₁₂ * 12H₂O
- Strunz 8th edition (series ID, updated)
- IV/F.13
Sources (2)
via Wikidata · CC0
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Encyclopedic overview
1 sectionsContents
- References
Schoepite, empirical formula (UO2)8O2(OH)12·12(H2O) is a rare alteration product of uraninite in hydrothermal uranium deposits. It may also form directly from ianthinite. The mineral presents as a transparent to translucent yellow, lemon yellow, brownish yellow, or amber orthorhombic tabular crystals. Although over 20 other crystal forms have been noted; rarely in microcrystalline aggregates. When exposed to air schoepite converts over a short time to the metaschoepite form (UO3·H2O, ) within a few months of being exposed to ambient air.
The hardness is 2.5, density is 4.8 g/cm3, and it streaks yellow.
Excerpted from Wikipedia’s “schoepite” article, available under the CC BY-SA 4.0 licence.