Mineral Information and Data:

Anyuiite
AuPb2 [CNMNC approved formula]

Named for the locality: Bolshoi Anyui River basin, Kolyma region, Russia.

IMA status : Approved Species 1987 (1987-053)
CLASSIFICATION 
Dana
(8th edition) :
01.01.04.01  
  (01) Native Elements
  (01.01) with metallic elements other than the platinum group
  (01.01.04) Anyuiite and related alloys
  
Nickel-Strunz
(10th edition) :
01.AA.15
  (01) Elements
  (01.A) Metals and Intermetallic Alloys
  (01.AA) Copper-cupalite family
  
Crystal system: Tetragonal System
Point group (H-M): 4/mmm (or 4/m 2/m 2/m) — ditetragonal-dipyramidal
Unit cell: a = 7.39 Å, c = 5.61 Å
Crystal Habit: Platy aggregates from 1-50 x 100-900 μm and prismatic crystals 50 x 100 μm in complex intergrowths with native lead
  
Color: Silvery gray
Diaphaneity: Opaque
Luster: Metallic
Hardness (Mohs): 3
Measured Density: 13.49 (computed) g/cm3
Tenacity: Malleable
Streak: Lead-gray
  
Geologic Setting: In placer concentrates derived from small ultramafic-gabbroid masses in a dunite-harzburgite formation (Bolshoi Anyui River basin, Russia); in gold concentrates from
placers (Hunchun River, China).
Mineral Association: Lead, gold, ilmenite, titanian magnetite, chrome spinel, hematite, pyrite, chalcopyrite, apatite (Bolshoi Anyui River basin, Russia); gold, lead, hunchinite, pyrite, pyrrhotite, magnetite, ilmenite (Hunchun River, China)
  

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