اوتونیت
Sign in to saveAutunite (hydrated calcium uranyl phosphate), with formula Ca(UO2)2(PO4)2·10–12H2O, is a yellow-greenish fluorescent phosphate mineral with a hardness of 2–. Autunite crystallizes in the orthorhombic system and often occurs as tabular square crystals, commonly in small crusts or in fan-like masses. Due to the moderate uranium content of 48.27% it is radioactive and also used as uranium ore. Autunite fluoresces bright green to lime green under UV light. The mineral is also called calco-uranite, but this name is rarely used and effectively outdated.
Key facts
- Mineral.name
- Autunite
- Mineral.boxbgcolor
- d2d75e
- Mineral.image
- Autunite-69257.jpg
- Mineral.caption
- Autunite from Daybreak Mine, Washington
- Mineral.category
- Phosphate minerals
- Mineral.formula
- Ca(UO2)2(PO4)2·10–12H2O
- Mineral.IMAsymbol
- Aut
- Mineral.molweight
- 986.26 g/mol
- Mineral.strunz
- 8.EB.05
- Mineral.system
- Orthorhombic
- Mineral.class
- Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)
- Mineral.symmetry
- Pnma
- Mineral.unit cell
- a = 14.0135(6), b = 20.7121(8), c = 6.9959(3) [Å]; Z = 4
- Mineral.color
- Lemon-yellow to sulfur-yellow, greenish yellow to pale green; may be dark green to greenish black
- Mineral.habit
- Tabular crystals, foliated or scaly aggregates, and in crusts
- Mineral.twinning
- Rare on {110}
- Mineral.cleavage
- {001} perfect, {100} and {010} poor
- Mineral.fracture
- uneven
via Wikipedia infobox
Wikidata facts
- Subclass of
- phosphate mineral
- Named after
- Autun
- Image
- Autunite carrière Les Oudots.jpg
Show 8 more facts
- described by source
- Encyclopædia Britannica 11th edition
- Commons category
- Autunite
- IMA Mineral Symbol
- Aut
- chemical formula
- Ca(UO₂)₂(PO₄)₂·(10-12)H₂O
- Strunz 8th edition (series ID, updated)
- VII/D.20a
- Nickel-Strunz 9th edition (updated 2009)
- 8.EB.05
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 8.EB.05
- crystal system
- orthorhombic crystal system
Sources (1)
via Wikidata · CC0