Mineral Information and Data:

Anilite
Cu7S4 [CNMNC approved formula]

Named for the locality : Ani mine, Akita Prefecture, Japan.

IMA status : Approved Species 1968 (IMA1968-030)
CLASSIFICATION 
Dana
(8th edition) :
02.04.07.05  
  (02) Sulfides - Including Selenides and Tellurides
  (02.04) where Am Bn Xp, with (m+n):p=2:1
  (02.04.07) Chalcocite Group ([Cu]2-x S] formulae)
  
Nickel-Strunz
(10th edition) :
02.BA.05f
  (02) Sulfides
  (02.B) Metal Sulfides, M:S > 1:1 (mainly 2:1)
  (02.BA) With Cu, Ag, Au
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
Unit cell: a = 7.89 Å, b = 7.84 Å, c = 11.01 Å
Crystal Habit: Crystals prismatic or platy
  
Color: Bluish grey
Diaphaneity: Opaque
Luster: Metallic
Hardness (Mohs): 3
Measured Density: 5.68 (calculated) g/cm3
Tenacity: Sectile
Streak: Black
  
Geologic Setting: In a drusy quartz vein (Ani mine, Japan); in a Kuroko ore deposit (Matsumine mine, Japan).
Mineral Association: Djurleite, covellite (Ani mine, Japan); yarrowite, spionkopite, djurleite, wittichenite, tennantite, chalcopyrite, bornite (Yarrow Creek, Canada); in red beds (Timna Formation, Israel; near Zurich, Switzerland)
  

 

Anilite
Origin: Tilva Mika Mine, Bor, Homoljske Mts., Serbia - Montenegro
Sample size: 5.6 x 2.8 x 2.4 cm
Photo: Rob Lavinsky

 

Anilite
(zoom-in of above)

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