Mineral Information and Data:

Arsenuranospathite  
Al(UO2)2(AsO4)2F • 20H2O [CNMNC approved formula]

Named as the "arsenate" analog of "uranospathite.".

IMA status : Valid species (Pre-IMA 1978) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
40.02a.23.01  
  (40) Hydrated Phosphates
  (40.02a) where A++ (B++)2 (XO4) · x(H2O), containing (UO2)++
  (40.02a.23)
  
Nickel-Strunz
(10th edition) :
08.EB.25
  (08) Phosphates, Arsenates, Vanadates
  (08.E) Uranyl Phosphates and Arsenates
  (08.EB) UO2:RO4 = 1:1
  
Crystal system: Tetragonal System
Point group (H-M): 4/m — dipyramidal
Crystal Habit: As crusts of wedgelike bladed or acicular crystals, to 0.3 mm, exhibiting {100}, {010}, {001}, and rarely {110}.
  
Color: Pale yellow, yellowish brown
Diaphaneity: Transparent to translucent
Hardness (Mohs): 2
Measured Density: 2.54 (calculated) g/cm3
Cleavage: Perfect on {001}; good on {100} and {010}
Streak: White
  
Geologic Setting: A very rare secondary mineral in uranium deposits.
Mineral Association: Zeunerite, uranophane, studtite, uranospinite, ianthinite, metakirchheimerite, “uranocircite”–heinrichite, barite, “limonite”.
  
Other Properties: Radioactive.

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