Junoite Mineral Data

General Junoite Information

Chemical Formula:

Pb3Cu2Bi8(S,Se)16

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 %

Empirical Formula:

Pb₃Cu₂Bi₈S₁₂Se₄

Environment:

Of hydrothermal origin.

IMA Status:

Approved IMA 1975

Locality:

In the Juno mine, Tennant Creek, Northern Territory, Australia. Link to MinDat.org Location Data.

Name Origin:

For the Juno mine, Australia, in which it was first found.

Name Pronunciation:

Junoite

Synonym:

ICSD 30777

PDF 42-567

Junoite Image

Images:

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

Axial Ratios:

a:b:c =6.5665:1:4.1945

Cell Dimensions:

a = 26.66, b = 4.06, c = 17.03, Z = 2; beta = 127.2° V = 1,468.26 Den(Calc)= 7.06

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.545(1), 3.904(0.8), 2.919(0.7),

Physical Properties of Junoite

Cleavage:

{???} Good

Color:

Gray.

Density:

6.77

Diaphaneity:

Opaque

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Metallic

Optical Properties of Junoite

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

RL Anisotrophism:

Strong.

RL Color:

Creamy white.

RL Pleochroism:

Strong, from cream to gray with green and mauve tints.

Calculated Properties of Junoite

Electron Density:

Bulk Density (Electron Density)=5.86 gm/cc
note: Specific Gravity of Junoite =7.06 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Junoite=1,417.51 barns/electron
U=PE_Junoite x rElectron Density=8,310.92 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Junoite is Not Radioactive

Junoite Classification

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

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

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

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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Print or Cut-and-Paste your Junoite Specimen Label here :

Junoite

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

Notes:

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