Mineral Information and Data:

Chlorargyrite
AgCl [CNMNC approved formula]

Named in allusion to the composition, containing CHLORine and silver (Latin: ARGentum). Name officially replaces cerargyrite: International Mineralogical Association (1962).

IMA status : Approved Species 1962 ()
CLASSIFICATION 
Dana
(8th edition) :
09.01.04.01  
  (09) Anhydrous and Hydrated Halides
  (09.01) where A X
  (09.01.04) Embolite Series
  
Nickel-Strunz
(10th edition) :
03.AA.15
  (03) Halides
  (03.A) Simple Halides, Without H2O
  (03.AA) M:X = 1:1, 2:3, 3:5, etc.
  
Crystal system: Cubic System
Point group (H-M): m3m (or 4/m 3 2/m) — hexoctahedral
Unit cell: a = 5.549Ǻ
Crystal Habit: Crystals cubic; massive, crusts and waxy coatings; columnar or fibrous
Twinning: On {111}
  
Color: Gray, greenish gray, yellowish; may turn violet-brown in light
Diaphaneity: Transparent, Translucent
Luster: Resinous to adamantine, waxy
Hardness (Mohs): 2.5
Measured Density: 5.556 g/cm3
Cleavage: None
Tenacity: Sectile and ductile; very plastic.
Fracture: Uneven to subconchoidal
Streak: White
  
Polymorphism and Series: Dimorphous with bromargyrite.
Geologic Setting: May be a rich ore in the oxidized zone above silver deposits; commonly preserved
in arid climates.
Mineral Association: Silver, cerussite, iodargyrite, atacamite, malachite, jarosite, Fe–Mn oxides
  
Synonyms/varieties: Cerargyrite, embolite
Comments: Chlorargyrite officially replaces cerargyrite:
IMA(1962) International Mineralogical Association: Commission on new minerals and mineral names, Mineralogical Magazine 33, 260-263

 

Chlorargyrite
Chlorargyrite and malachite
Origin: Bisbee, Cochise Co., Arizona, U.S.A.
Sample size: Microscopic image
Photo and Owner: Lou Perloff

 

Chlorargyrite
Origin: St Georg Mine, Schneeberg District,
Erzgebirge, Saxony, Germany
Picture size: 8.5 mm
Photo and Owner: Thomas Witzke

 

Chlorargyrite
Grey crude crystals to 1 mm on white calcite.
Origin: Silver Coin mine, Humboldt Co., Nevada, United States
Sample size: 3 x 2 x 2 cm
Tom Loomis

 

Chlorargyrite
(zoom-in of above)

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