Mineral Information and Data:

Agrinierite  
K2(Ca,Sr)(UO2)6O6(OH)4 • 5H2O [CNMNC approved formula]

Named for Henri Agrinier (1928-1971), an engineer in the Mineralogy Laboratory if the French Atomic Energy Commission, Paris, France.

IMA status : Approved Species 1971 (IMA1971-046)
CLASSIFICATION 
Dana
(8th edition) :
05.05.01.01  
  (05) Oxides Containing Uranium and Thorium
  (05.05) with alkaline and alkaline-earth elements (hydrated)
  (05.05.01)
  
Nickel-Strunz
(10th edition) :
04.GB.05
  (04) Oxides and Hydroxides
  (04.G) Uranyl Hydroxides
  (04.GB) With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
Unit cell: a = 14.04 Å, b = 24.07 Å, c = 14.13 Å
Crystal Habit: Crystals tabular on {001}, pseudohexagonal in section
Twinning: Sector twinning with composition plane {110}
  
Color: Orange
Diaphaneity: Transparant to translucent
Luster: Resinous, greasy
Hardness (Mohs): No data
Measured Density: 5.7 g/cm3
  
Geologic Setting: In the oxidation zone of a uranium deposit.
Mineral Association: Uranophane, “gummite”
  
Other Properties: Radioactive. Gemstone Readily Available.

 

Agrinierite
Origin: Margnac mine, Compreignac, Haute-Vienne, France
Sample size: Microscopic image
Photo and Owner: Lou Perloff

 

Agrinierite
Origin: Margnac mine, Compreignac, Haute-Vienne, France
Sample size: Microscopic image
Photo and Owner: Lou Perloff

 

Agrinierite
Red veins in quarz associated with chalcopyrite
and black crusts of colloidal galena
Origin: Mina El Tunnel, Divisadera, Sonora, Mexico
Sample size: micromount
Photo: Diederik Visser

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