Mineral Information and Data:

Aubertite
Cu2+Al(SO4)2Cl • 14H2O [CNMNC approved formula]

Named for J. Aubert (1929- ), French geophysicist who collected the first specimens.

IMA status : Approved Species 1978 (IMA1978-051)
CLASSIFICATION 
Dana
(8th edition) :
31.09.08.01  
  (31) Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.09) where (A+ B++) (XO4) Zq · x(H2O)
  (31.09.08) Aubertite Group
  
Nickel-Strunz
(10th edition) :
07.DB.05
  (07) Sulfates (selenates, tellurates, chromates, molybdates, wolframates)
  (07.D) Sulfates (selenates, etc.) with additional anions, with H2O
  (07.DB) With only medium-sized cations; insular octahedra and finite units
  
Crystal system: Triclinic System
Point group (H-M): 1 — pedial
Unit cell: a = 6.28Å, b = 13.23Å, c = 6.28Å α = 91.17°, β = 94.67°, γ = 82.45°
Crystal Habit: As crusts of corroded grains.
  
Color: Azure-blue
Diaphaneity: Transparent
Hardness (Mohs): 2 - 3
Measured Density: 1.815 g/cm3
Cleavage: {010}, perfect
  
Geologic Setting: In the oxidized zone of a copper deposit.
Mineral Association: Copiapite, botryogen, amarantite, arabutlerite, metahohmannite
  
Other Properties: H2O Soluble.

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