Emilite Mineral Data

Emilite Mineral Data

General Emilite Information

Chemical Formula:

Cu10.7Pb10.7Bi21.3S48

Composition:

Molecular Weight = 8,887.43 gm

Copper 7.65 % Cu

Bismuth 50.09 % Bi

Lead 24.95 % Pb

Sulfur 17.32 % S

______

100.00 %

Empirical Formula:

Cu_10.7Pb_10.7Bi_21.3S₄₈

Environment:

Metamorphosed scheelite deposit. Member of the bismuthinite-krupkaite-aikinite solid-solution series.

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Felbertal scheelite deposit, Austria. Link to MinDat.org Location Data.

Name Origin:

Presumabley named for Emil Makovicky of the University of Copenhagen.

Synonym:

IMA2001-015

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Emilite Crystallography

Axial Ratios:

a:b:c =0.0895:1:0.2578

Cell Dimensions:

a = 4.0285, b = 44.986, c = 11.599, Z = 1; V = 2,102.04 Den(Calc)= 7.02

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: P mc2₁

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

By Intensity(I/I_o): 3.656(1), 2.852(0.95), 3.567(0.81),3.152(0.78), 3.174(0.71), 4.04(0.49),

Crystal Structure:

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Balic-Zunic T , Topa D , Makovicky E , The Canadian Mineralogist , 40 (2002) p.239-245, The crystal structure of emilite, Cu10.7Pb10.7Bi21.3S48, the second 45, angstrom derivative of the bismuthinite-aikinite solid-solution series

Physical Properties of Emilite

Cleavage:

None

Color:

Tin white.

Diaphaniety:

Opaque

Luster:

Metallic

Optical Properties of Emilite

RL Anisotrophism:

Moderate.

RL Color:

Tin white with no internal reflections.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Emilite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
460 nm	39.52	46.88
540 nm	39.26	48.06
580 nm	39.02	48.34
640 nm	38.51	47.35

**Calculated Relative Intensity Colors of Emilite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	230%
R₁
R₂

Calculated Properties of Emilite

Electron Density:

r_electron=5.88 gm/cc
note: r_Emilite=7.02 gm/cc.

Fermion Index

Fermion Index = 0.05642
Boson Index = 0.94358

Photoelectric:

PE_Emilite=1,423.80 barns/electron
U=PE_Emilite x r_electron=8,375.36 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Emilite is Not Radioactive

Emilite Classification

Dana Class:

3.6.22.1 (3)Sulfides - Sulfosalts

(3.6)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.6.22)Dana Group

3.6.22.1 Emilite ! Cu10.7Pb10.7Bi21.3S48 P mc2₁ mm2

Strunz Class:

II/E.30-25 II - Sulfides and sulphosalts

II/E - Sulfosalts (S : As,Sb,Bi = x) Lead-Sulfosalts (Pb-Cu/Ag) with predominant Vismut x = 6.0 - 1.6

II/E.30 - Aikinite - Pekoite series

II/E.30-10 Aikinite PbCuBiS3 Pbnm 2/m 2/m 2/m

II/E.30-15 Soucekite PbCuBi(S,Se)3 Pn21m mm2

II/E.30-20 Friedrichite Pb5Cu5Bi7S18 Pb21m mm2

II/E.30-25 Emilite Cu10.7Pb10.7Bi21.3S48 P mc2₁ mm2

II/E.30-30 Hammarite Pb2Cu2Bi4S9(?) Pbnm 2/m 2/m 2/m

II/E.30-40 Lindstromite Pb3Cu3Bi7S15 Pbnm 2/m 2/m 2/m

II/E.30-50 Krupkaite PbCuBi3S6 P mc2₁ mm2

II/E.30-54 Paarite! Cu1.7Pb1.7Bi6.3S12 Pmcn 2/m 2/m 2/m

II/E.30-60 Gladite PbCuBi5S9 P nma 2/m 2/m 2/m

II/E.30-70 Pekoite PbCuBi11(S,Se)18 P 2₁am mm2

Other Emilite Information

References:

NAME( CanMin, 40:239) PHYS. PROP.(CanMin, 40:239) OPTIC PROP.(AmMin, 89:1826)

See Also:

Links to other databases for Emilite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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

Emilite

Cu10.7Pb10.7Bi21.3S48
Dana No: 3.6.22.1 Strunz No: II/E.30-25
Locality:

Notes: