General Uchucchacuaite Information
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Chemical Formula: |
AgPb3MnSb5S12 |
Composition: |
Molecular Weight = 1,777.95 gm |
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Manganese 3.09 % Mn |
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Silver 6.07 % Ag |
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Antimony 34.24 % Sb |
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Lead 34.96 % Pb |
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Sulfur 21.64 % S |
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______ |
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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. |
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Uchucchacuaite Image |
Images:
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Uchucchacuaite Crystallography
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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 |
X Ray Diffraction: |
By Intensity(I/Io): 3.3(1), 2.9(0.8), 3.8(0.3), |
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Physical Properties of Uchucchacuaite
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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 |
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Optical Properties of Uchucchacuaite
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Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Uchucchacuaite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
36.20 |
44.30 |

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| 420 nm |
36.30 |
44.20 |

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| 440 nm |
35.80 |
44.20 |

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| 460 nm |
35.20 |
43.80 |

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| 480 nm |
35.00 |
43.90 |

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| 500 nm |
34.70 |
43.70 |

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| 520 nm |
34.50 |
43.40 |

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| 540 nm |
34.10 |
43.30 |

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| 560 nm |
33.80 |
43.00 |

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| 580 nm |
33.50 |
42.60 |

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| 600 nm |
33.20 |
42.40 |

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| 620 nm |
33.00 |
42.00 |

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| 640 nm |
32.70 |
41.80 |

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| 660 nm |
32.30 |
41.20 |

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| 680 nm |
31.80 |
40.60 |

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| 700 nm |
31.20 |
39.90 |

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Calculated Relative Intensity Colors of Uchucchacuaite in Air
Relative Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
240% |
270% |
| R1 |
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| R2 |
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Calculated Properties of Uchucchacuaite
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Electron Density: |
relectron=4.74 gm/cc note: rUchucchacuaite =5.51 gm/cc. |
Fermion Index |
Fermion Index = 0.07888 Boson Index = 0.92112 |
Photoelectric: |
PEUchucchacuaite = 758.93 barns/electron U=PEUchucchacuaite x relectron=3,598.52 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Uchucchacuaite is Not Radioactive |
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Uchucchacuaite Classification
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Dana Class: |
3.4.15.5 (3)Sulfides - Sulfosalts |
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(3.4)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(3.4.15)Lillianite Group (Orthorhombic, AmBnS6 where A=Pb, Ag, Mn and B=Sb, Bi) |
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3.4.15.1 Lillianite Pb3Bi2S6 Bbmm 2/m 2/m 2/m |
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3.4.15.2 Bursaite Pb5Bi4S11 Bbmm 2/m 2/m 2/m |
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3.4.15.3 Gustavite PbAgBi3S6(?) Bbmm 2/m 2/m 2/m |
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3.4.15.4 Andorite PbAgSb3S6 Pmma 2/m 2/m 2/m |
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3.4.15.5 Uchucchacuaite AgPb3MnSb5S12 P mmm 2/m 2/m 2/m |
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3.4.15.6 Ramdohrite Ag3Pb6Sb11S24 P 2/n 2/m |
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3.4.15.7 Roshchinite Ag19Pb10Sb51S96orPb(Ag,Cu)2(Sb,As)5S10 Pmna 2/m 2/m 2/m |
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3.4.15.8 Fizelyite Pb14Ag5Sb21S48(?) P 21/n 2/m |
Strunz Class: |
II/E.23-10 II - Sulfides and sulphosalts |
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II/E - Sulfosalts (S : As,Sb,Bi = x) Complex Lead-Sulfosalts (Pb-Fe/Mn, Pb-Ag), with predominant Antimon x = 2.3 - 2.0 |
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II/E.23 - Uchucchacuaite - Roshchinite series |
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II/E.23-10 Uchucchacuaite AgPb3MnSb5S12 P mmm 2/m 2/m 2/m |
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II/E.23-20 Fizelyite Pb14Ag5Sb21S48(?) P 21/n 2/m |
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II/E.23-30 Ramdohrite Ag3Pb6Sb11S24 P 2/n 2/m |
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II/E.23-40 Andorite PbAgSb3S6 Pmma 2/m 2/m 2/m |
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II/E.23-50 Roshchinite Ag19Pb10Sb51S96orPb(Ag,Cu)2(Sb,As)5S10 Pmna 2/m 2/m 2/m |
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Other Uchucchacuaite Information
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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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Print or Cut-and-Paste your Uchucchacuaite Specimen Label here :
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Uchucchacuaite
AgPb3MnSb5S12
Dana No: 3.4.15.5 Strunz No: II/E.23-10
Locality:
Notes:
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