Iodargyrite
Iodargyrite on gossan, Broken Hill Ore Deposit, New South Wales, Australia.
General
CategoryHalide minerals
Formula
(repeating unit)
AgI
IMA symbolIag[1]
Strunz classification3.AA.10
Crystal systemHexagonal
Crystal classDihexagonal pyramidal (6mm)
H-M symbol: (6mm)
Space groupP6mm
Unit cella = 4.59, c = 7.51 [Å]; Z = 2
Identification
ColorColorless (fresh); pale yellow, yellow, greenish yellow, brownish, grayish
Mohs scale hardness1+12 - 2
LusterAdamantine, resinous
StreakYellow (shining)
DiaphaneityTransparent, translucent
Specific gravity5.69
Optical propertiesUniaxial (+)
Refractive indexnω = 2.210 nε = 2.220
Birefringenceδ = 0.010
References[2][3]

Iodyrite or iodargyrite is a natural mineral form of silver iodide.

Related minerals are chlorargyrite and bromargyrite.

References

  1. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. Mindat page for iodargyrite
  3. Webmineral page for iodargyrite


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