scheelita
Sign in to saveScheelite is a calcium tungstate mineral with the chemical formula CaWO4. It is an important ore of tungsten (wolfram). Scheelite is originally named after Swedish chemist Carl Wilhelm Scheele (1742–1786). Well-formed crystals are sought by collectors and are occasionally fashioned into gemstones when suitably free of flaws. Scheelite has been synthesized using the Czochralski process; the material produced may be used to imitate diamond, as a scintillator, or as a solid-state lasing medium. It was also used in radium paint in the same fashion as was zinc sulphide, and Thomas Edison invented a
Key facts
- Mineral.name
- Scheelite
- Mineral.category
- Tungstate mineral
- Mineral.boxbgcolor
- ee964b
- Mineral.image
- Scheelite-224167.jpg
- Mineral.imagesize
- 260px
- Mineral.formula
- CaWO4
- Mineral.IMAsymbol
- Sch
- Mineral.strunz
- 7.GA.05
- Mineral.system
- Tetragonal
- Mineral.class
- Dipyramidal (4/m) H-M symbol: (4/m)
- Mineral.symmetry
- I41/a
- Mineral.unit cell
- a = 5.2429(3), Å c = 11.3737(6) Å; Z = 4
- Mineral.color
- Colorless, white, gray, dark brown, brown, tan, pale yellow, yellow-orange, golden yellow, pale shades of orange, red, green, etc.; colorless in transmitted light and may be compositionally color zoned
- Mineral.habit
- Pseudo-octahedra, massive, columnar, granular
- Mineral.twinning
- Common, penetration and contact twins, composition plane {110} or {001}
- Mineral.cleavage
- On {101}, distinct; on {112}, interrupted; on {001}, indistinct
- Mineral.fracture
- Subconchoidal to uneven
- Mineral.tenacity
- Brittle
via Wikipedia infobox
Wikidata facts
- Subclass of
- phosphate mineral
- Named after
- Carl Wilhelm Scheele
- Image
- Scheelite MHNT.MIN.2004.0.88 (p).jpg
Show 8 more facts
- Nickel-Strunz 9th edition (updated 2009)
- 7.GA.05
- Commons category
- Scheelite
- chemical formula
- CaWO₄
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 7.GA.05
- streak color
- white
- crystal system
- tetragonal crystal system
- IMA Mineral Symbol
- Sch
- Strunz 8th edition (series ID, updated)
- VI/F.01
Sources (2)
via Wikidata · CC0
Article · Português
A scheelita ou scheelite é um mineral de gênese metamórfica (substância natural) composto quimicamente por tungstato de cálcio (CaWO4), sendo explorada em minérios com vista à obtenção do elemento tungstênio. No Brasil, a maior produção histórica de scheelita ocorreu no estado do Rio Grande do Norte, na região do Seridó, especialmente nos municípios de Currais Novos, São João do Sabugi, São Tomé e Acari onde cerca de 36.544 t de concentrado, com teor médio de 73% WO3, foram extraídas de um único depósito nas minas Brejuí,Oiticica,Barra Verde, Boca de Lage e Zangarelhas, desde a sua descoberta em 1942 até 1982.
Abstract from DBpedia / Wikipedia · CC BY-SA