Uchucchacuaite Mineral Data

Uchucchacuaite Mineral Data +

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General Uchucchacuaite Information

Chemical Formula:

AgPb3MnSb5S12

Composition:

Molecular Weight = 1,777.95 gm

Manganese 3.09 % Mn

Silver 6.07 % Ag

Antimony 34.24 % Sb

Lead 34.96 % Pb

Sulfur 21.64 % S

______

100.00 %

Empirical Formula:

AgPb₃Mn³⁺Sb₅S₁₂

Environment:

In a telescoped hydrothermal deposit.

IMA Status:

Approved IMA 1984

Locality:

Uchuc-Chacua deposit, Cajatambo Province, Peru. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Uchucchacuaite Image

Images:

Uchucchacuaite

Comments: Corroded grain of uchucchacuaite in matrix.
Location: Bera Basin #4 mine, King Co., Washington, USA. Scale: Crystal size 1 mm.
© Tom Loomis / Dakota Matrix

Uchucchacuaite Crystallography

Axial Ratios:

a:b:c =0.6557:1:0.2267

Cell Dimensions:

a = 12.67, b = 19.32, c = 4.38, Z = 2; V = 1,072.16 Den(Calc)= 5.51

Crystal System:

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

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

By Intensity(I/I_o): 3.3(1), 2.9(0.8), 3.8(0.3),

Physical Properties of Uchucchacuaite

Color:

Lead gray.

Density:

5.16

Diaphaniety:

Opaque

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

Twinning Common - Crystals are usually twinned.

Hardness:

3.5 - Copper Penny

Luster:

Metallic

Optical Properties of Uchucchacuaite

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Uchucchacuaite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	36.20	44.30
420 nm	36.30	44.20
440 nm	35.80	44.20
460 nm	35.20	43.80
480 nm	35.00	43.90
500 nm	34.70	43.70
520 nm	34.50	43.40
540 nm	34.10	43.30
560 nm	33.80	43.00
580 nm	33.50	42.60
600 nm	33.20	42.40
620 nm	33.00	42.00
640 nm	32.70	41.80
660 nm	32.30	41.20
680 nm	31.80	40.60
700 nm	31.20	39.90

**Calculated Relative Intensity Colors of Uchucchacuaite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%	270%
R₁
R₂

Calculated Properties of Uchucchacuaite

Electron Density:

r_electron=4.74 gm/cc
note: r_{Uchucchacuaite}=5.51 gm/cc.

Fermion Index

Fermion Index = 0.07888
Boson Index = 0.92112

Photoelectric:

PE_{Uchucchacuaite}= 758.93 barns/electron
U=PE_{Uchucchacuaite} x r_electron=3,598.52 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Uchucchacuaite is Not Radioactive

Uchucchacuaite Classification

Dana Class:

3.4.15.5 (3)Sulfides - Sulfosalts

(3.4)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.4.15)Lillianite Group (Orthorhombic, AmBnS6 where A=Pb, Ag, Mn and B=Sb, Bi)

3.4.15.1 Lillianite Pb3Bi2S6 Bbmm 2/m 2/m 2/m

3.4.15.2 Bursaite Pb5Bi4S11 Bbmm 2/m 2/m 2/m

3.4.15.3 Gustavite PbAgBi3S6(?) Bbmm 2/m 2/m 2/m

3.4.15.4 Andorite PbAgSb3S6 Pmma 2/m 2/m 2/m

3.4.15.5 Uchucchacuaite AgPb3MnSb5S12 P mmm 2/m 2/m 2/m

3.4.15.6 Ramdohrite Ag3Pb6Sb11S24 P 2/n 2/m

3.4.15.7 Roshchinite Ag19Pb10Sb51S96orPb(Ag,Cu)2(Sb,As)5S10 Pmna 2/m 2/m 2/m

3.4.15.8 Fizelyite Pb14Ag5Sb21S48(?) P 2₁/n 2/m

Strunz Class:

II/E.23-10 II - Sulfides and sulphosalts

II/E - Sulfosalts (S : As,Sb,Bi = x) Complex Lead-Sulfosalts (Pb-Fe/Mn, Pb-Ag), with predominant Antimon x = 2.3 - 2.0

II/E.23 - Uchucchacuaite - Roshchinite series

II/E.23-10 Uchucchacuaite AgPb3MnSb5S12 P mmm 2/m 2/m 2/m

II/E.23-20 Fizelyite Pb14Ag5Sb21S48(?) P 2₁/n 2/m

II/E.23-30 Ramdohrite Ag3Pb6Sb11S24 P 2/n 2/m

II/E.23-40 Andorite PbAgSb3S6 Pmma 2/m 2/m 2/m

II/E.23-50 Roshchinite Ag19Pb10Sb51S96orPb(Ag,Cu)2(Sb,As)5S10 Pmna 2/m 2/m 2/m

Other Uchucchacuaite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Uchucchacuaite :
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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Uchucchacuaite

AgPb3MnSb5S12
Dana No: 3.4.15.5 Strunz No: II/E.23-10
Locality:

Notes: