Mineral Information and Data:

Allargentum
Ag1-xSbx(x=0.09-0.16) [CNMNC approved formula]

Named in 1950 from the Greek άλλος ("allos") for "another" and latin argentum, "silver".

IMA status : Redefined IMA Approved; 0 ()
CLASSIFICATION 
Dana
(8th edition) :
02.02.01.02  
  (02) Sulfides - Including Selenides and Tellurides
  (02.02) where Am Bn Xp, with (m+n):p=3:1
  (02.02.01) Dyscrasite Group
  
Nickel-Strunz
(10th edition) :
02.AA.30
  (02) Sulfides
  (02.A) Simple Sulfides, Selenides, etc
  (02.AA) Alloys of metalloids with Cu, Ag, Au
  
Crystal system: Hexagonal System
Point group (H-M): 6/mmm (or 6/m 2/m 2/m) — dihexagonal-dipyramidal
Unit cell: a = 2.952 Å, c = 4.773 Å
Crystal Habit: Massive, in complex intergrowths with silver; small grains
  
Color: Silver, white
Diaphaneity: Opaque
Luster: Metallic
Hardness (Mohs): 3.5
Measured Density: 10.0 (synthetic) g/cm3
  
Geologic Setting: In high-grade Ag–Sb ores.
Mineral Association: Silver containing antimony and mercury, dyscrasite, breithauptite, domeykite, kutınaite, stephanite
  

 

Allargentum
Origin: Glen Lake mine, Cobalt, Ontario, Canada (type locality)
Sample size: 3 x 2.5 x 1 cm
Photo: Tom Loomis

 

Allargentum
(zoom-in of above)

<<< BACK TO MINERAL SEARCH