Paarite Mineral Data

Paarite Mineral Data

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General Paarite Information

Chemical Formula:

Cu1.7Pb1.7Bi6.3S12

Composition:

Molecular Weight = 2,161.22 gm

Iron 0.08 % Fe

Copper 4.76 % Cu

Bismuth 60.82 % Bi

Lead 16.68 % Pb

Sulfur 17.66 % S

______

100.00 %

Empirical Formula:

Cu_1.62Fe²⁺_0.03Pb_1.74Bi_6.29S_11.9

Environment:

Metamorphosed scheelite deposit. (56 Å derivative of the bismuthinite–aikinite series)

IMA Status:

Approved IMA 2001 (Dana # Added)

Locality:

Felbertal, Austria Link to MinDat.org Location Data.

Name Origin:

Named for. W. Paar (Salzburg) of the University of Copenhagen and the University of Salzburg.

Synonym:

IMA2001-016

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Paarite Crystallography

Axial Ratios:

a:b:c =0.0715:1:0.2055

Cell Dimensions:

a = 4.007, b = 55.998, c = 11.512, Z = 5; V = 2,583.11 Den(Calc)= 6.95

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmcn

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

By Intensity(I/I_o): 3.63(1), 3.136(0.92), 3.55(0.85),3.155(0.57), 4.01(0.56), 3.58(0.55), 2.56(0.41),

Crystal Structure:

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Makovicky E , Topa D , Balic-Zunic T , The Canadian Mineralogist , 39 (2001) p.1377-1382, The crystal structure of paarite, the newly discovered 56 A derivative, of the bismuthinite-aikinite solid-solution series

Physical Properties of Paarite

Color:

Tin white.

Diaphaniety:

Opaque

Luster:

Metallic

Optical Properties of Paarite

RL Anisotrophism:

Distinct.

RL Color:

Tin white with no internal reflections.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Paarite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
460 nm	48.16	38.32
540 nm	48.56	37.42
580 nm	48.09	36.93
640 nm	46.69	36.20

**Calculated Relative Intensity Colors of Paarite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%
R₁
R₂

Calculated Properties of Paarite

Electron Density:

r_electron=5.81 gm/cc
note: r_Paarite=6.95 gm/cc.

Fermion Index

Fermion Index = 0.0382
Boson Index = 0.9618

Photoelectric:

PE_Paarite=1,481.43 barns/electron
U=PE_Paarite x r_electron=8,602.83 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Paarite is Not Radioactive

Paarite Classification

Dana Class:

3.8.17.1 (3)Sulfides - Sulfosalts

(3.8)where 1 < z/y <2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.8.17)Dana Group

3.8.17.1 Paarite ! Cu1.7Pb1.7Bi6.3S12 Pmcn 2/m 2/m 2/m

Strunz Class:

II/E.30-54 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 Paarite Information

References:

NAME( CanMin 39:1377) PHYS. PROP.(AmMin 89:1831) OPTIC PROP.(AmMin, 89:1831)

See Also:

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

Paarite

Cu1.7Pb1.7Bi6.3S12
Dana No: 3.8.17.1 Strunz No: II/E.30-54
Locality:

Notes: