Ikunolite Mineral Data

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.

Synonym:

ICSD 25795

PDF 25-1175

Search for Ikunolite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

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

Diaphaniety:

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:

r_electron=6.70 gm/cc
note: r_Ikunolite=8.24 gm/cc.

Fermion Index

Fermion Index = 0.00521
Boson Index = 0.99479

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ikunolite is Not Radioactive

Ikunolite Classification

Dana Class:

2.6.2.3 (2)Sulfides - Including Selenides and Tellurides

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

(2.6.2)Joseite Group (Trigonal: R3¯m)

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

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

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

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

2.6.2.5 Pilsenite Bi4Te3 R 3m 3 2/m

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

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

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

Strunz Class:

II/D.11-10 II - Sulfides and sulphosalts

II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold

II/D.11 - Tetradymite group, Ikunolite - Joseite-B series

II/D.11-10 Ikunolite Bi4(S,Se)3 R 3m 3 2/m

II/D.11-20 Laitakarite Bi4(Se,S)3 R 3m 3 2/m

II/D.11-30 Joseite Bi4(S,Te)3 R 3m 3 2/m

II/D.11-35 Joseite-B Bi4(S,Te)3 R 3m 3 2/m

II/D.11-40 Pilsenite Bi4Te3 R 3m 3 2/m

Other Ikunolite Information

References:

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

Search for Ikunolite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Ikunolite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Ikunolite Mineral Data :

Ask about Ikunolite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Ikunolite

Bi4(S,Se)3
Dana No: 2.6.2.3 Strunz No: II/D.11-10
Locality:

Notes: