Mineralogy Database

Iodargyrite Mineral Data

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General Iodargyrite Information

Help on Chemical  Formula: Chemical Formula: AgI
Help on Composition: Composition: Molecular Weight = 234.77 gm
   Silver  45.95 %  Ag   49.35 % Ag2O
   Iodine  54.05 %  I    54.05 % I
             -   %  I    -3.41 % -O=I2    
          ______        ______ 
          100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: AgI
Help on Environment: Environment: Secondary mineral associated with weathered silver ores.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1854
Help on Locality: Locality: Broken Hill, New South Wales. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its chemical composition if iodine (Greek, iodes = "violet") and silver (Latin, argentum).
Help on Name Pronunciation: Name Pronunciation: Iodargyrite + Pronunciation Say IODARGYRITE
Help on Synonym: Synonym: ICSD 65063
  PDF 9-374

Iodargyrite Image

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Comments: Aggregate crystal of Iodargyrite on matrix.
Location: Broken Hill, New South Wales, Australia. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

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  Iodargyrite   Embolite

Comments: Cubo-octahedral crystals of iodaryrite (I) with smaller and darker octahedral crystals of embolite (E).
Location: Broken Hill, New South Wales, Australia. Scale: Specimen size 2x1 cm.
© Dave Barthelmy

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  Coronadite   Iodargyrite

Comments: Dark, fine-grained massive coronadite with yellowish octahedral iodargyrite crystals.
Location: Broken Hill, New South Wales, Australia. Scale: Picture size 3x2 cm.
© Dave Barthelmy

Iodargyrite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.63538
Help on Cell Dimensions: Cell Dimensions: a = 4.5922, c = 7.51, Z = 2; V = 137.16 Den(Calc)= 5.68
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Pyramidal H-M Symbol (6mm) Space Group: P 63mc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.73(1), 2.296(0.85), 3.98(0.6),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 9 9 2) ( 7 7 6) ( 9 9 4) ( 1 1 1) ( 1 1 1) ( 0 1 0) ( 0 0 1)

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Physical Properties of Iodargyrite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Colorless, Pale yellow, Yellow, Greenish yellow, Gray.
Help on Density: Density: 5.5 - 5.7, Average = 5.6
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Luster: Luster: Adamantine - Greasy
Help on Streak: Streak: white

Optical Properties of Iodargyrite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.055 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2139,KPDmeas= 0.217,KC= 0.2056
Ncalc = 2.13 - 2.17
Help on Optical Data: Optical Data: Uniaxial (+), w=2.21, e=2.22, bire=0.0100.

Calculated Properties of Iodargyrite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.84 gm/cc
note: Specific Gravity of Iodargyrite =5.68 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0
Boson Index = 1
Help on Photoelectric: Photoelectric: PEIodargyrite = 336.51 barns/electron
U=PEIodargyrite x rElectron Density=1,628.30 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Iodargyrite is Not Radioactive

Iodargyrite Classification

Help on  Dana Class: Dana Class: (09)Anhydrous and Hydrated Halides
  (09.01)where A X
  (09.01.05)Dana Group Iodargyrite AgI P 63mc 6mm
Help on  Strunz Class: Strunz Class: 03.AA.10 03 - HALIDES
  03.A - Simple Halides, Without H2O
  03.AA -M:X = 1:1, 2:3, 3:5, etc.
03.AA.10 Iodargyrite AgI P 63mc 6mm
03.AA.10 Tocornalite (Ag,Hg)I(?) Hex ? Hex

Other Iodargyrite Information

Help on References: References: NAME( Emsley91) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Iodargyrite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 03.AA.10