توربرنیت
Sign in to saveAlso known as chalcolite
Torbernite, also known as chalcolite, is a relatively common mineral with the chemical formula Cu[(UO2)(PO4)]2·12H2O. It is a radioactive, hydrated green copper uranyl phosphate, found in granites and other uranium-bearing deposits as a secondary mineral. The chemical formula of torbernite is similar to that of autunite in which a Cu2+ cation replaces a Ca2+ cation. Torbernite tends to dehydrate to metatorbernite with the sum formula Cu[(UO2)(PO4)]2·8H2O.
Key facts
- Mineral.caption
- Torbernite crystals from Mashamba West Mine, Kolwezi, Katanga Province, Democratic Republic of the Congo
- Mineral.formula
- Cu[(UO2)(PO4)]2(H2O)12
- Mineral.IMAsymbol
- Tor
- Mineral.molweight
- 641 – 713 g/mol, depending the degree of water loss
- Mineral.strunz
- 8.EB.05
- Mineral.system
- Tetragonal
- Mineral.class
- Ditetragonal dipyramidal (4/mmm) H-M symbol: (4/m 2/m 2/m)
- Mineral.symmetry
- I4/mmm
- Mineral.color
- Emerald green to apple green
- Mineral.habit
- Tabular crystals; Foliated to earthy masses and encrustations
- Mineral.twinning
- Rare on [110]
- Mineral.cleavage
- [001] Perfect; [100] Distinct
- Mineral.fracture
- Brittle
- Mineral.mohs
- 2–2.5
- Mineral.luster
- Vitreous; pearly
- Mineral.refractive
- nω = 1.590 – 1.592 nε = 1.581 – 1.582
- Mineral.opticalprop
- Uniaxial (−)
- Mineral.birefringence
- δ = 0.009 – 0.010
via Wikipedia infobox
Wikidata facts
- Named after
- Torbern Bergman
- Image
- Wulfenite-Kasolite-Torbernite-214957.jpg
Show 9 more facts
- type locality (geology)
- Johanngeorgenstadt
- Commons category
- Torbernite
- crystal system
- tetragonal crystal system
- Nickel-Strunz 9th edition (updated 2009)
- 8.EB.05
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 8.EB.05
- Commons gallery
- Torbernite
- IMA Mineral Symbol
- Tor
- chemical formula
- Cu(UO₂)₂(PO₄)₂·12H₂O
- Strunz 8th edition (series ID, updated)
- VII/D.20a
Sources (1)
via Wikidata · CC0