Cupropavonite Mineral Data

Cupropavonite Mineral Data

General Cupropavonite Information

Chemical Formula:

AgPbCu2Bi5S10

Composition:

Molecular Weight = 1,807.72 gm

Copper 7.03 % Cu

Silver 5.97 % Ag

Bismuth 57.80 % Bi

Lead 11.46 % Pb

Sulfur 17.74 % S

______

100.00 %

Empirical Formula:

AgPbCu₂Bi₅S₁₀

Environment:

Found in zoned mesothermal base- and precious-metal veins.

IMA Status:

Approved IMA 1979

Locality:

In the USA, from the Alaska mine, Poughkeepsie Gulch, near Ouray, San Juan Co., and at the Missouri mine, Hall's Valley, Park Co., Colorado. Link to MinDat.org Location Data.

Name Origin:

To stress a similarity with pavonite.

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Cupropavonite Crystallography

Axial Ratios:

a:b:c =3.3457:1:8.2238

Cell Dimensions:

a = 13.45, b = 4.02, c = 33.06, Z = 4; beta = 93.5° V = 1,784.19 Den(Calc)= 6.73

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

Physical Properties of Cupropavonite

Cleavage:

None

Color:

Gray, Tin white.

Diaphaniety:

Opaque

Hardness:

2 - Gypsum

Luster:

Metallic

Streak:

lead gray

Optical Properties of Cupropavonite

RL Anisotrophism:

Distinct.

RL Color:

White.

RL Pleochroism:

Weak in air, weak to distinct in oil.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Cupropavonite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	45.10	48.20
420 nm	45.00	48.80
440 nm	45.00	49.40
460 nm	44.60	49.80
480 nm	44.40	50.20
500 nm	43.90	50.00
520 nm	43.40	49.10
540 nm	43.00	48.20
560 nm	42.50	47.50
580 nm	42.20	46.90
600 nm	42.10	46.40
620 nm	42.00	46.40
640 nm	41.90	46.20
660 nm	41.70	46.10
680 nm	41.60	46.00
700 nm	41.20	45.60

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

Calculated Properties of Cupropavonite

Electron Density:

r_electron=5.67 gm/cc
note: r_{Cupropavonite}=6.73 gm/cc.

Fermion Index

Fermion Index = 0.02666
Boson Index = 0.97334

Photoelectric:

PE_{Cupropavonite}=1,332.82 barns/electron
U=PE_{Cupropavonite} x r_electron=7,562.05 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Cupropavonite is Not Radioactive

Cupropavonite Classification

Dana Class:

3.8.10.6 (3)Sulfides - Sulfosalts

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

(3.8.10)Pavonite Group (Monoclinic: C/2c bismuth sulfosalts)

3.8.10.1 Pavonite (Ag,Cu)(Bi,Pb)3S5 C 2/c 2/m

3.8.10.2 Makovickyite Ag1.5Bi5.5S9 C 2/c 2/m

3.8.10.3 Benjaminite (Ag,Cu)3(Bi,Pb)7S12 C 2/c 2/m

3.8.10.4 Mummeite Ag3CuPbBi6S13orAg2Cu2Pb2Bi6S13 C 2/c 2/m

3.8.10.5 Borodaevite Ag5(Bi,Sb)9S16 C 2/c 2/m

3.8.10.6 Cupropavonite AgPbCu2Bi5S10 C 2/c 2/m

3.8.10.7 Cupromakovickyite! Cu4AgPb2Bi9S18 C 2/m 2/m

3.8.10.8 Kudriavite! (Cd,Pb)Bi2S4 C 2/m 2/m

Strunz Class:

II/E.09-40 II - Sulfides and sulphosalts

II/E - Sulfosalts (S : As,Sb,Bi = x) Sulfosalts with predominant Silver, x = 6.0 - 1.6

II/E.09 - Benjaminite - Kitaibelite series

II/E.09-05 Borodaevite Ag5(Bi,Sb)9S16 C 2/c 2/m

II/E.09-10 Benjaminite (Ag,Cu)3(Bi,Pb)7S12 C 2/c 2/m

II/E.09-20 Mummeite Ag3CuPbBi6S13orAg2Cu2Pb2Bi6S13 C 2/c 2/m

II/E.09-30 Pavonite (Ag,Cu)(Bi,Pb)3S5 C 2/c 2/m

II/E.09-40 Cupropavonite AgPbCu2Bi5S10 C 2/c 2/m

II/E.09-50 Kitaibelite* Ag10PbBi30S51 Mono ? Mono

II/E.09-60 Makovickyite Ag1.5Bi5.5S9 C 2/c 2/m

Other Cupropavonite Information

References:

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

See Also:

Links to other databases for Cupropavonite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Cupropavonite

AgPbCu2Bi5S10
Dana No: 3.8.10.6 Strunz No: II/E.09-40
Locality:

Notes: