Ikunolite Mineral Data

General Ikunolite Information

Chemical Formula:

Bi4(S,Se)3

Composition:

Molecular Weight = 967.29 gm

Bismuth 86.42 % Bi

Selenium 6.12 % Se

Sulfur 7.46 % S

______

100.00 %

Empirical Formula:

Bi₄S_2.25Se_0.75

Environment:

In a quartz vein.

IMA Status:

Approved IMA 1959

Locality:

At the Ikuno and Akenobe mines, Hyogo Prefecture, and the Ashio mine, Tochigi Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

For the Ikuno mine, Japan, in which it was first found.

Name Pronunciation:

Ikunolite + Pronunciation

Synonym:

ICSD 25795

PDF 25-1175

Ikunolite Image

Images:

Ikunolite

Comments: B&W polished section showing kunolite( ik) in association with bismuth bi) and bismuthinite (bt). (AmMin, v47:1431).
Location: Bismuth-molybdenite pipes at Kingsgate in the New England district of New South Wales, Australia. Scale: 150 X.
© American Mineralogist

Images:

Ikunolite

Comments: Gray metallic grains of ikunolite on matrix.
Location: Also-Rozsa adit, Nagyborzsony, Borzsony Mts., Pest Co., Hungary. Scale: Specimen Size 10x5 mm.
© Sergey Vasiliev / Systematic Mineralogy

Ikunolite Crystallography

Axial Ratios:

a:c = 1:9.44337

Cell Dimensions:

a = 4.15, c = 39.19, Z = 3; V = 584.52 Den(Calc)= 8.24

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 3.022(1), 4.34(0.5), 2.205(0.3),

Physical Properties of Ikunolite

Cleavage:

{???} Perfect

Color:

Lead gray.

Density:

7.8

Diaphaneity:

Opaque

Hardness:

2 - Gypsum

Luster:

Metallic

Streak:

dark gray

Optical Properties of Ikunolite

Optical Data:

NCalc= 2.21 - from Gladstone-Dale relationship (KC = 0.1474) where Ncalc=Dcalc*KC+1
NCalc= 2.15 - from Gladstone-Dale relationship (KC = 0.1474) where Ncalc=Dmeas*KC+1

RL Anisotrophism:

Nearly isotropic in basal section, moderately anisotropic, pale gray to gray, in diagonal section.

RL Color:

White with faint creamy tint.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Ikunolite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	46.60	48.80
420 nm	46.30	49.00
440 nm	46.00	49.20
460 nm	45.70	49.00
480 nm	45.50	48.70
500 nm	45.30	48.60
520 nm	45.20	48.60
540 nm	45.00	48.80
560 nm	45.00	48.90
580 nm	44.90	49.00
600 nm	44.90	49.00
620 nm	44.80	48.90
640 nm	44.60	48.70
660 nm	44.20	48.50
680 nm	43.80	48.10
700 nm	43.40	47.60

**Calculated Relative Intensity Colors of Ikunolite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	200%
R₁
R₂

Calculated Properties of Ikunolite

Electron Density:

Bulk Density (Electron Density)=6.70 gm/cc
note: Specific Gravity of Ikunolite =8.24 gm/cc.

Fermion Index:

Fermion Index = 0.0052131927
Boson Index = 0.9947868073

Photoelectric:

PE_Ikunolite=1,715.06 barns/electron
U=PE_Ikunolite x rElectron Density=11498.07 barns/cc.

Radioactivity:

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

Ikunolite Classification

Dana Class:

02.06.02.03 (02)Sulfides - Including Selenides and Tellurides

(02.06)where Am Bn Xp, with (m+n):p=4:3

(02.06.02)Joseite Group (Trigonal: R-3m)

02.06.02.01 Joseite Bi4(S,Te)3 R 3m 3 2/m

02.06.02.02 Joseite-B Bi4(S,Te)3 R 3m 3 2/m

02.06.02.03 Ikunolite Bi4(S,Se)3 R 3m 3 2/m

02.06.02.04 Laitakarite Bi4(Se,S)3 R 3m 3 2/m

02.06.02.05 Pilsenite Bi4Te3 R 3m 3 2/m

02.06.02.06 Poubaite PbBi2Se2(Te,S)2 R 3m 3 2/m

02.06.02.07 Rucklidgeite (Bi,Pb)3Te4 R 3m 3 2/m

02.06.02.08 Babkinite! Pb2Bi2(S,Se)3 P 3,P 3m Trig

Strunz Class:

02.DC.05d 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.D - Metal Sulfides, M:S = 3:4 and 2:3

02.DC -Variable M:S

02.DC.05d Laitakarite Bi4(Se,S)3 R 3m 3 2/m

02.DC.05d Ikunolite Bi4(S,Se)3 R 3m 3 2/m

02.DC.05d Joseite Bi4(S,Te)3 R 3m 3 2/m

02.DC.05d Joseite-B Bi4(S,Te)3 R 3m 3 2/m

02.DC.05d Pilsenite Bi4Te3 R 3m 3 2/m

Other Ikunolite Information

References:

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

See Also:

Links to other databases for Ikunolite :
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 Ikunolite Specimen Label here :

Ikunolite

Bi4(S,Se)3
Dana No: 02.06.02.03 Strunz No: 02.DC.05d
Locality:

Notes: