Mineralogy Database

Marshite Mineral Data

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General Marshite Information

Help on Chemical  Formula: Chemical Formula: CuI
Help on Composition: Composition: Molecular Weight = 190.45 gm
   Copper  33.37 %  Cu   37.57 % Cu2O
   Iodine  66.63 %  I    66.63 % I
             -   %  I    -4.20 % -O=I2    
          ______        ______ 
          100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CuI
Help on Environment: Environment: Found with oxidized copper minerals.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1892
Help on Locality: Locality: Broken Hill, New South Wales, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for C. W. Marsh, Autralian mineral collector who first described the mineral.
Help on Name Pronunciation: Name Pronunciation: Marshite Say MARSHITE
Help on Synonym: Synonym: ICSD 76611
  PDF 6-246

Marshite Image

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

Marshite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 6.054, Z = 4; V = 221.88 Den(Calc)= 5.70
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): 3.493(1), 2.139(0.55), 1.824(0.3),
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: ( 1 1 3) ( 2 2 3) ( 1 1 1) ( 0 0 1)

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Physical Properties of Marshite

Help on Cleavage: Cleavage: {011} Perfect
Help on Color: Color: Brown, Colorless, Light yellow, Dark brownish red.
Help on Density: Density: 5.6 - 5.9, Average = 5.75
Help on Diaphaneity: Diaphaneity: Transparent to subtranslucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Fluorescent, Long UV=dark red.
Help on Luster: Luster: Adamantine - Greasy
Help on Streak: Streak: yellow

Optical Properties of Marshite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2361,KPDmeas= 0.2341,KC= 0.2392
Ncalc = 2.34 - 2.41
Help on Optical Data: Optical Data: Isotropic, n=2.346.

Calculated Properties of Marshite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.91 gm/cc
note: Specific Gravity of Marshite =5.70 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0
Boson Index = 1
Help on Photoelectric: Photoelectric: PEMarshite = 276.75 barns/electron
U=PEMarshite x rElectron Density=1,358.41 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Marshite is Not Radioactive

Marshite 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 Marshite 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 Marshite :
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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