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Carnotite

• 
  Anderson Mine (Date Creek project; U-V Mine; Uranium-Air Mine), Date Creek Basin, Yavapai Co., Arizona, USA
  © Stephan Wolfsried

• Formula:
  K₂(UO₂)₂(VO₄)₂ · 3H₂O

• System: Monoclinic

• Name:
  Named for Marie-Adolphe Carnot (1839-1920), French mining engineer and chemist.

• IMA Status: Valid (Grandfathered)

• Type Locality:
  Rajah Mine, Uravan District, Montrose Co., Colorado, USA

• Dana 8th: 40.2a.28.1
  
  40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
  2a : AB₂(XO₄)₂·xH₂O, containing (UO₂)²⁺

• Hardness (Mohs): 2

• Density: 4.7 g/cm³ (measured)
  4.91 g/cm³ (calculated)

• Lustre: Silky,Dull,Earthy

• Diapheny: Translucent

• Colour: Bright yellow, yellow, greenish yellow

• Streak: Strontian-yellow