Junoite Mineral Data

Junoite Mineral Data
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General Junoite Information

Help on Chemical Formula: Chemical Formula: Pb3Cu2Bi8(S,Se)16
Help on Composition: Composition: Molecular Weight = 3,121.17 gm
   Copper     4.07 %  Cu
   Bismuth   53.56 %  Bi
   Lead      19.92 %  Pb
   Selenium  10.12 %  Se
   Sulfur    12.33 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Pb3Cu2Bi8S12Se4
Help on Environment: Environment: Of hydrothermal origin.
Help on IMA Status: IMA Status: Approved IMA 1975
Help on Locality: Locality: In the Juno mine, Tennant Creek, Northern Territory, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the Juno mine, Australia, in which it was first found.
Help on Name Pronunciation: Name Pronunciation: Junoite Say JUNOITE
Help on Synonym: Synonym: ICSD 30777
  PDF 42-567
 

Junoite Image

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Junoite

Comments: Solid crystalline mass of dark gray, metallic junoite. Partially sawed indicating analytical verification.
Location: 700 level, Juno Mine, Tennant Creek, Northern Territory, Australia. Scale: 3x2x2cm.
© Tom Loomis / Dakota Matrix

Junoite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =6.5665:1:4.1945
Help on Cell Dimensions: Cell Dimensions: a = 26.66, b = 4.06, c = 17.03, Z = 2; beta = 127.2° V = 1,468.26 Den(Calc)= 7.06
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.545(1), 3.904(0.8), 2.919(0.7),
Click Here for Large Junoite Structure Window Crystal Structure:

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Mumme W G , American Mineralogist , 60 (1975) p.548-558, Junoite, Cu2Pb3Bi8(S,Se)16, a new sulfosalt from Tennant Creek, Australia:, Its crystal structure and relationship with other bismuth sulfosalts

 

Physical Properties of Junoite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Gray.
Help on Density: Density: 6.77
Help on Diaphaneity: Diaphaneity: Opaque
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luster: Luster: Metallic
 

Optical Properties of Junoite

Help on Optical Data: Optical Data: NCalc= 1.92 - from Gladstone-Dale relationship (KC = 0.1306) where Ncalc=Dcalc*KC+1
NCalc= 1.88 - from Gladstone-Dale relationship (KC = 0.1306) where Ncalc=Dmeas*KC+1
Help on RL Anisotrophism: RL Anisotrophism: Strong.
Help on RL Color: RL Color: Creamy white.
Help on RL Pleochroism: RL Pleochroism: Strong, from cream to gray with green and mauve tints.
 

Calculated Properties of Junoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.86 gm/cc
note: Specific Gravity of Junoite =7.06 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEJunoite =1,417.51 barns/electron
U=PEJunoite x rElectron Density=8,310.92 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Junoite is Not Radioactive
 

Junoite Classification
Help on Dana Class: Dana Class: 03.07.14.01 (03)Sulfides - Sulfosalts
  (03.07)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.07.14)Dana Group
 
03.07.14.01 Junoite Pb3Cu2Bi8(S,Se)16 C 2/m 2/m
 
03.07.14.02 Felbertalite! Cu2Pb6Bi8S19 C 2/m 2/m
Help on Strunz Class: Strunz Class: 02.JB.25a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.J - Sulfosalts of PbS Archetype
  02.JB -Galena derivatives, with Pb
 
02.JB.25a Junoite Pb3Cu2Bi8(S,Se)16 C 2/m 2/m
 

Other Junoite Information
Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Junoite :
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
15 - WWW-MINCRYST

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Junoite

Pb3Cu2Bi8(S,Se)16
Dana No: 03.07.14.01 Strunz No: 02.JB.25a
Locality:

 

Notes: