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What is Arsenuranospathite ? or Arsen Uranospathite

Posted By vivek_khare2080 on Jan 04, 2009   FROM: webmineral.com report abuse

General Information About Arsenuranospathite | Crystallography Of Arsenuranospathite | Physical Properties of Arsenuranospathite | Optical Properties of Arsen Uranospathite

Arsenuranospathite is a very rare secondary mineral chemical in Uranium deposits. Arsenuranospathites' IMA status is a approved in 1978. Arsenuranospathite is made in Germany, in the Black Forest, at Menzenschwand and on the dump of the Spohia mine, near Wittichen. Arsenuranospathite is known as the "arsenate" analog of "Uranospathite".

General Arsenuranospathite Information :

  • Chemical Formula : HAl (UO2) 4 (AsO4) 4.40 (H2O)
  • Composition : Molecular Weight = 2,384.39 gm
  • Empirical Formula : HAl (UO2) 4 (AsO4) 4.40 (H2O)
  • Environment : A very rare secondary mineral in uranium deposits.
  • IMA Status : Approved IMA 1978
  • Locality : In Germany, in the Black Forest, at Menzenschwand and on the dump of the Sophia mine, near Wittichen. Link to MinDat.org Location Data.
  • Name Origin : As the arsenate analog of uranospathite.

Arsenuranospathite Crystallography :

  • Axial Ratios : a : c = 1 : 4.24162
  • Cell Dimensions : a = 7.16, c = 30.37, Z = 1; V = 1,556.94 Den (Calc) = 2.54
  • Crystal System : Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group : P 41 / n
  • X Ray Diffraction : By Intensity (I/Io) : 7.62 (1), 14.62 (1), 3.49 (0.9),

Physical Properties of Arsenuranospathite :

  • Cleavage : [001] Perfect, [100] Distinct
  • Color : White, Light yellow.
  • Density : 2.54
  • Diaphaniety : Transparent to Translucent
  • Hardness : 2 - Gypsum
  • Luster : Vitreous (Glassy)
  • Streak : white

Optical Properties of Arsenuranospathite :

  • Gladstone-Dale : CI meas= -0.149 (Poor) - where the CI = (1-KPDmeas / KC)
  • CI calc= -0.149 (Poor) - where the CI = (1-KPDcalc / KC)
  • KPD calc = 0.2126, KPD meas = 0.2126, KC = 0.185
  • Optical Data : Uniaxial (-), e=1.538, w = 1.542, bire = 0.0040.

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