Emilite Mineral Data

General Emilite Information

Chemical Formula:

Cu2.68Pb2.68Bi5.32S12

Composition:

Molecular Weight = 2,230.52 gm

Copper 7.49 % Cu

Bismuth 50.03 % Bi

Lead 25.08 % Pb

Sulfur 17.39 % S

______

100.00 %

Empirical Formula:

Cu_2.63Pb_2.7Bi_5.34S_12.1

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

Emilite Image

Images:

Emilite

Comments: Polished section epoxy grain mount PPL image of emilite.
Location: Westfeld, Felbertal, Mittersill, Salzburg, Austria. Scale: Picture Size 0.7 mm.
© Bernhard Pracejus

Emilite Crystallography

Axial Ratios:

a:b:c =0.0895:1:0.2578

Cell Dimensions:

a = 4.0285, b = 44.986, c = 11.599, Z = 4; V = 2,102.04 Den(Calc)= 7.05

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:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
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Help on Above

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:

{0kl} Imperfect

Color:

Tin white.

Diaphaneity:

Opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Metallic

Streak:

grayish black

Optical Properties of Emilite

RL Anisotrophism:

Moderate with greenish to grayish rotation tints.

RL Bireflectance:

Very weak, whitish to yellowish tints.

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
470 nm	39.40	46.95
540 nm	39.26	48.06
546 nm	39.21	48.25
580 nm	39.02	48.34
589 nm	38.98	48.35
640 nm	38.51	47.35
650 nm	38.30	46.94

**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:

Bulk Density (Electron Density)=5.91 gm/cc
note: Specific Gravity of Emilite =7.05 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Emilite=1,425.23 barns/electron
U=PE_Emilite x rElectron Density=8,419.24 barns/cc.

Radioactivity:

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

Emilite Classification

Dana Class:

03.06.22.01 (03)Sulfides - Sulfosalts

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

(03.06.22)Dana Group

03.06.22.01 Emilite! Cu2.68Pb2.68Bi5.32S12 P mc2₁ mm2

Strunz Class:

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

02.H - Sulfosalts of SnS Archetype

02.HB -With Cu, Ag, Hg, Fe, Sn and Pb

02.HB.05a Aikinite PbCuBiS3 Pbnm 2/m 2/m 2/m

02.HB.05a Hammarite Pb2Cu2Bi4S9(?) Pbnm 2/m 2/m 2/m

02.HB.05a Gladite PbCuBi5S9 P nma 2/m 2/m 2/m

02.HB.05a Friedrichite Pb5Cu5Bi7S18 Pb21m mm2

02.HB.05a Lindstromite Pb3Cu3Bi7S15 Pbnm 2/m 2/m 2/m

02.HB.05a Krupkaite PbCuBi3S6 P mc2₁ mm2

02.HB.05a Pekoite PbCuBi11(S,Se)18 P 2₁am mm2

02.HB.05a Paarite! Cu1.7Pb1.7Bi6.3S12 Pmcn 2/m 2/m 2/m

02.HB.05a Emilite! Cu2.68Pb2.68Bi5.32S12 P mc2₁ mm2

02.HB.05a Salzburgite! Cu1.6Pb1.6Bi6.4S12 P mc2₁ mm2

Other Emilite Information

References:

NAME( CanMin, 40:239) PHYS. PROP.(CanMin, 40:239, AmMin, 91:1950) OPTIC PROP.(AmMin, 89:1826)

See Also:

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

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

Emilite

Cu2.68Pb2.68Bi5.32S12
Dana No: 03.06.22.01 Strunz No: 02.HB.05a
Locality:

Notes: