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Miersite Mineral Data

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General Miersite Information

Help on Chemical  Formula: Chemical Formula: (Ag,Cu)I
Help on Composition: Composition: Molecular Weight = 223.69 gm
   Copper   7.10 %  Cu    8.00 % Cu2O
   Silver  36.17 %  Ag   38.85 % Ag2O
   Iodine  56.73 %  I    56.73 % I
             -   %  I    -3.58 % -O=I2    
          ______        ______ 
          100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ag0.75Cu0.25I
Help on Environment: Environment: Forms a partial series with marshite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1898
Help on Locality: Locality: Broken Hill, New South Wales, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Henry Alexander Miers (1848-1942), English mineralogist, Oxford University.
Help on Name Pronunciation: Name Pronunciation: Miersite Say MIERSITE
Help on Synonym: Synonym: ICSD 61542
  PDF 2-499

Miersite Image

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

Miersite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 6.504, Z = 4; V = 275.13 Den(Calc)= 5.40
Help on Crystal System: Crystal System: Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: F43m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.23(1), 1.95(0.8), 2.28(0.8),

Physical Properties of Miersite

Help on Cleavage: Cleavage: {111} Good, {111} Good, {111} Good
Help on Color: Color: Greenish, Canary yellow, Light yellow.
Help on Density: Density: 5.64
Help on Diaphaneity: Diaphaneity: Transparent to subtranslucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: greenish yellow

Optical Properties of Miersite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.044 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2222,KPDmeas= 0.2128,KC= 0.2128
Ncalc = 2.15 - 2.2
Help on Optical Data: Optical Data: Isotropic, n=2.2.

Calculated Properties of Miersite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.82 gm/cc
note: Specific Gravity of Miersite =5.64 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0
Boson Index = 1
Help on Photoelectric: Photoelectric: PEMiersite = 323.69 barns/electron
U=PEMiersite x rElectron Density=1,558.79 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Miersite is Not Radioactive

Miersite Classification

Help on  Dana Class: Dana Class: (09)Anhydrous and Hydrated Halides
  (09.01)where A X
  (09.01.07)Nantokite Series Nantokite CuCl F43m 4 3m Miersite (Ag,Cu)I F43m 4 3m Marshite CuI F43m 4 3m
Help on  Strunz Class: Strunz Class: 03.AA.05 03 - HALIDES
  03.A - Simple Halides, Without H2O
  03.AA -M:X = 1:1, 2:3, 3:5, etc.
03.AA.05 Marshite CuI F43m 4 3m
03.AA.05 Nantokite CuCl F43m 4 3m
03.AA.05 Miersite (Ag,Cu)I F43m 4 3m

Other Miersite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Miersite :
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.05





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