Mineral Information and Data:

Bromargyrite
AgBr [CNMNC approved formula]

Named after its composition of bromine (Greek, bromos - "stench") and silver (Latin, argentum). First published in 1849. Approved and defined (IMA, 1960).

IMA status : Approved Species 1960 ()
CLASSIFICATION 
Dana
(8th edition) :
09.01.04.02  
  (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
Space group: Fm3m
Unit cell: a = 5.7745Å, Z=4
Crystal Habit: Crystals cubic, with {111} and {011}, to 1 cm; in parallel or subparallel groups; commonly as crusts and coatings, massive.
Twinning: {111}, rare
  
Color: Pale yellow, greenish brown, bright green
Diaphaneity: Transparent to translucent
Luster: Resinous to adamantine, waxy.
Hardness (Mohs): 2.5
Measured Density: 6.474 g/cm3
Tenacity: Sectile, ductile, very plastic
Fracture: Uneven to subconchoidal
Streak: White to yellowish white
  
Polymorphism and Series: Dimorphous with chlorargyrite.
Geologic Setting: A rare secondary mineral in the oxidation zones of silver deposits, notably in arid regions.
Mineral Association: Silver, iodargyrite, smithsonite, Fe–Mn oxides
  
Comments: May give off a strong “medicinal” odor when exposed to air.

 

Bromargyrite
Origin: Broken Hill, New South Wales, Australia
Sample size: Microscopic image
Photo and Owner: Lou Perloff

 

Bromargyrite
Faint yellow micro crystals to about 0.5 mm with cerussite.
Origin: Bob Montgomery claims, Granite Gap, Hidalgo Co., New Mexico, USA.
Sample size: 8 x 7 x 4 cm
Photo: Tom Loomis

 

Bromargyrite
(zoom-in of above)

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