Mineral Information and Data:

Aurivilliusite
Hg1+Hg2+OI [CNMNC approved formula]

Named for Karin Aurivillius (1920-1982), chemist-crystallographer at the University of Lund, Sweden, who determined the crystal structure of numerous synthetic Hg compounds.

IMA status : Approved Species 2004 (IMA2002-022)
CLASSIFICATION 
Dana
(8th edition) :
10.04.02.02  
  (10) Oxyhalides and Hydroxyhalides
  (10.04) where (A)2 (O,OH) Xq
  (10.04.02) Terlinguaite Group
  
Nickel-Strunz
(10th edition) :
03.DD.50
  (03) Halides
  (03.D) Oxyhalides, Hydroxyhalides and Related Double Halides
  (03.DD) With Hg
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
Unit cell: a = 17.58Å, b = 6.979Å, c = 6.693Å β = 101.71°
Crystal Habit: Thin irregular patches to 0.5 mm on the quartz surface and, very rarely, subhedral platy crystals to 0.2 mm
  
Color: Dark gray-black
Diaphaneity: Opaque
Luster: Metallic
Measured Density: 8.96 (calculated) g/cm3
Cleavage: Distinct/Good along {100}
  
Geologic Setting: Associated with other mercury minerals in a quartz-magnesite host-rock
Mineral Association: Quartz, Mercury, Magnesite, Edgarbaileyite
  

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