Mineral Information and Data:

Asselbornite  
Pb(UO2)4(BiO)3(AsO4)2(OH)7 • 4H2O [CNMNC approved formula]

Named for Eric Asselborn (1954-), mineral collector and surgeon, Montrevel-en-Bresse, Dijon, France, in whose collection the mineral was first found..

IMA status : Approved Species 1983 (IMA1980-087)
CLASSIFICATION 
Dana
(8th edition) :
42.04.11.01  
  (42) Hydrated Phosphates Containing Hydroxyl or Halogen
  (42.04) where (AB)5 (XO4)2 Zq · x(H2O)
  (42.04.11) Asselbornite Group
  
Nickel-Strunz
(10th edition) :
08.ED.10
  (08) Phosphates, Arsenates, Vanadates
  (08.E) Uranyl Phosphates and Arsenates
  (08.ED) Unclassified
  
Crystal system: Cubic System
Point group (H-M): m3m (or 4/m 3 2/m) — hexoctahedral
Unit cell: a = 5.291Å, b = 9.16Å, c = 10.12Å β = 105.1°
Crystal Habit: Crystals are cubes modified into tetrahedra or pseudotetrahedra, to 0.3 mm.
  
Color: Brown to lemon-yellow; yellow in transmitted light.
Diaphaneity: Translucent
Luster: Greasy to adamantine
Measured Density: 5.6 (calculated) g/cm3
  
Mineral Association: Uranospinite, uranophane, uranosphaerite, quartz
  
Other Properties: Radioactive.

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