Uchucchacuaite Mineral Data

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.

Name Pronunciation:

Uchucchacuaite + Pronunciation

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 - Dipyramidal H-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

Diaphaneity:

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:

Bulk Density (Electron Density)=4.74 gm/cc
note: Specific Gravity of Uchucchacuaite =5.51 gm/cc.

Fermion Index:

Fermion Index = 0.07
Boson Index = 0.93

Photoelectric:

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

Radioactivity:

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

Uchucchacuaite Classification

Dana Class:

03.04.15.05 (03)Sulfides - Sulfosalts

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

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

03.04.15.01 Lillianite Pb3Bi2S6 Bbmm 2/m 2/m 2/m

03.04.15.02 Bursaite? Pb5Bi4S11 Bbmm 2/m 2/m 2/m

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

03.04.15.04 Andorite PbAgSb3S6 Pmma 2/m 2/m 2/m

03.04.15.05 Uchucchacuaite AgPb3MnSb5S12 P mmm 2/m 2/m 2/m

03.04.15.06 Ramdohrite Ag3Pb6Sb11S24 P 2/n 2/m

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

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

Strunz Class:

02.JB.40a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.J - Sulfosalts of PbS Archetype

02.JB -Galena derivatives, with Pb

02.JB.40a Fizelyite Pb14Ag5Sb21S48(?) P 2₁/n 2/m

02.JB.40a Andorite PbAgSb3S6 Pmma 2/m 2/m 2/m

02.JB.40a Bursaite? Pb5Bi4S11 Bbmm 2/m 2/m 2/m

02.JB.40a Gustavite PbAgBi3S6(?) Bbmm 2/m 2/m 2/m

02.JB.40a Lillianite Pb3Bi2S6 Bbmm 2/m 2/m 2/m

02.JB.40a Roshchinite Ag19Pb10Sb51S96orPb(Ag,Cu)2(Sb,As)5S10 Pmna 2/m 2/m 2/m

02.JB.40a Uchucchacuaite AgPb3MnSb5S12 P mmm 2/m 2/m 2/m

02.JB.40a Ramdohrite Ag3Pb6Sb11S24 P 2/n 2/m

02.JB.40a Xilingolite Pb3Bi2S6 C 2/m 2/m

02.JB.40a Treasurite Ag7Pb6Bi15S32 B2/m 2/m

02.JB.40a Vikingite Ag5Pb8Bi13S30 C 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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Uchucchacuaite

AgPb3MnSb5S12
Dana No: 03.04.15.05 Strunz No: 02.JB.40a
Locality:

Notes:

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