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Anataas

Anataas
 
Formule TiO2 
Onsuiwerhede Fe,Sn,Nb,V 
Nickel-Strunz (10) 4.DD.05  
Kleur bruin, liggeel, indigo, swart, liggroen, grys, selde amper kleurloos[1] 
Streep wit tot liggeel 
Glans vetagtig, glasagtig 
Hardheid 5,5 – 6 (Mohs);
616 -698 kgf/mm2 (Vickers) 
Digtheid 3,79 - 3,97 g/cm3 
Dubbelbreking eenassig 
RI-waardes 2,561 en 2,488 
Kristalsisteem tetragonaal 
Ruimtegroep I4₁/amd 
Strukturbericht-kode C5 
Nommer 141 
Eenheidsel a = 3.7845 Å, c = 9.5143 Å 
* Lys van minerale
Portaal Geologie

Anataas is 'n mineraal met formule TiO2. Dit is een van ses strukture met hierdie formule. Dit is 'n laetemperatuur- en laedrukfase wat oorgaan in die rutiel-struktuur bo 730 °C.[2]

Verwysings

[wysig | wysig bron]
  1. "mindat 213" (in Engels). Geargiveer vanaf die oorspronklike op 18 April 2020.
  2. Rutile and its applications in earth sciences Guido Meinhold Earth-Science Reviews 102 (2010) 1-28
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Anataas
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