Menchettiite (original) (raw)
A valid IMA mineral species
About MenchettiiteHide
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Formula:
AgPb2.40Mn1.60Sb3As2S12
Specific Gravity:
5.146 (Calculated)
Crystal System:
Monoclinic
Name:
Named in honour of Silvio Menchetti (1937–), Professor of Mineralogy and Crystallography at the University of Florence, for his contribution to the systematics of sulfosalts.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:41603:0
e0f22f05-6248-4b50-8c17-0ba07ffdbbdf
IMA Classification of MenchettiiteHide
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IMA Formula:
Pb5Mn3Ag2Sb6As4S24
Type description reference:
Bindi, L., Keutsch, F. N., Bonazzi, P. (2012) Menchettiite, AgPb2.40Mn1.60Sb3As2S12, a new sulfosalt belonging to the lillianite series from the Uchucchacua polymetallic deposit, Lima Department, Peru. American Mineralogist, 97 (2) 440-446 doi:10.2138/am.2012.3944
Classification of MenchettiiteHide
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2.JB.40a
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
J : Sulfosalts of PbS archetype
B : Galena derivatives, with Pb
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Men | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of MenchettiiteHide
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Hardness:
VHN100=128 kg/mm2 - Vickers
Fracture:
Irregular/Uneven
Density:
5.146 g/cm3 (Calculated)
Optical Data of MenchettiiteHide
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Anisotropism:
Without characteristic rotation tints
Bireflectance:
Weakly to moderately bireflectant
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 471.1nm | 33.1% | 39.8% |
| 548.3nm | 31.8% | 38.0% |
| 586.6nm | 30.9% | 37.3% |
| 652.3nm | 29.0% | 35.8% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 39.8%.
R1 shown in black, R2 shown in red
Internal Reflections:
None
Comments:
Weakly pleochroic from dark gray to a dark green
Chemistry of MenchettiiteHide
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Mindat Formula:
AgPb2.40Mn1.60Sb3As2S12
Crystallography of MenchettiiteHide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 19.233(2) Å, b = 12.633(3) Å, c = 8.476(2) Å
β = 90.08(2)°
Ratio:
a:b:c = 1.522 : 1 : 0.671
Twinning:
Twinned on {100}
Comment:
Space group P21/n.
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0018781 | Menchettiite | Bindi L, Keutsch F N, Bonazzi P (2012) Menchettiite, AgPb2.40Mn1.60Sb3As2S12, a new sulfosalt, belonging to the lillianite series from the Uchucchacua polymetallic deposit, Lima Department, Peru Note site occupancy model I American Mineralogist 97 440-446 | 2012 | Uchucchacua, Lima Department, Peru | 0 | 293 | |
| 0018782 | Menchettiite | Bindi L, Keutsch F N, Bonazzi P (2012) Menchettiite, AgPb2.40Mn1.60Sb3As2S12, a new sulfosalt, belonging to the lillianite series from the Uchucchacua polymetallic deposit, Lima Department, Peru Note site occupancy model II American Mineralogist 97 440-446 | 2012 | Uchucchacua, Lima Department, Peru | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.4066 Å | (39) |
| 3.4025 Å | (39) |
| 3.2853 Å | (100) |
| 2.8535 Å | (50) |
| 2.8519 Å | (47) |
| 2.1190 Å | (33) |
Geological EnvironmentHide
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Type Occurrence of MenchettiiteHide
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General Appearance of Type Material:
Anhedral to subhedral grains up to 200 µm across.
Place of Conservation of Type Material:
Museo di Storia Naturale, Sezione di Mineralogia e Litologia, Università di Firenze, via La Pira 4, I-50121, Firenze, Italy, catalog number 3109/I.
Geological Setting of Type Material:
Hydrothermal epigenetic deposit
Associated Minerals at Type Locality:
Reference:
Bindi, L., Keutsch, F.N., Bonazzi, P. (2012) Menchettiite, AgPb2.40Mn1.60Sb3As2S12, a new sulfosalt belonging to the lillianite series from the Uchucchacua polymetallic deposit, Lima Department, Peru. American Mineralogist: 97: 440-446.
Synonyms of MenchettiiteHide
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Relationship of Menchettiite to other SpeciesHide
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Other Members of this group:
Related Minerals - Strunz-mindat GroupingHide
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| 2.JB. | Senandorite | AgPbSb3S6 | Orth. m _m_2 : P m _n_21 |
|---|---|---|---|
| 2.JB. | Oscarkempffite | Ag10Pb4(Sb17Bi9)S48 | Orth. m _m_2 |
| 2.JB. | Chukotkaite | AgPb7Sb5S15 | Mon. 2/m : _P_21/b |
| 2.JB. | Arsenquatrandorite | Ag17.6Pb12.8Sb38.1As11.5S96 | Mon. 2/m : _P_21/b |
| 2.JB. | Clino-oscarkempffite | Ag15Pb6Sb21Bi18S72 | Mon. 2/m : _P_21/b |
| 2.JB. | Andreadiniite | CuHgAg7Pb7Sb24S48 | Mon. 2/m : _P_21/b |
| 2.JB. | Ginelfite | Ag2(Ag0.5Fe)TlPb23.5(Sb,As)33.5S76 | Tric. 1 : _P_1 |
| 2.JB. | Lazerckerite | Ag3.75Pb4.50(Sb7.75Bi4)S24 | Mon. 2/m |
| 2.JB. | Lasmanisite | Ag12Pb13Mn11Sb44S96 | Orth. 222 : _P_212121 |
| 2.JB. | Montpelvouxite | AgPb16Sb27As18S84 | Tric. 1 : _P_1 |
| 2.JB. | Selenojunoite | Cu2Pb3Bi8Se16 | Mon. 2/m : _B_2/m |
| 2.JB.05 | Diaphorite | Ag3Pb2Sb3S8 | Mon. 2/m : _P_21/b |
| 2.JB.10 | Cosalite | Pb2Bi2S5 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 2.JB.15 | Freieslebenite | AgPbSbS3 | Mon. 2/m : _P_21/b |
| 2.JB.15 | Marrite | AgPbAsS3 | Mon. 2/m : _P_21/b |
| 2.JB.20 | Cannizzarite | Pb48Bi56S132 | Mon. 2/m : _P_21/m |
| 2.JB.20 | Wittite | Pb9Bi12(S,Se)27 | Mon. |
| 2.JB.25a | Junoite | Cu2Pb3Bi8(S,Se)16 | Mon. 2/m : _B_2/m |
| 2.JB.25i | Neyite | Ag2Cu6Pb25Bi26S68 | Mon. 2/m : _B_2/m |
| 2.JB.25c | Nordströmite | CuPb3Bi7(Se4S10) | Mon. 2/m : _P_21/m |
| 2.JB.25g | Nuffieldite | Cu1.4Pb2.4Bi2.4Sb0.2S7 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 2.JB.25d | Proudite | CuPb7.5Bi9.33(S,Se)22 | Mon. 2/m : _B_2/m |
| 2.JB.25h | Weibullite | Pb5Bi8Se7S11 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
| 2.JB.25b | Felbertalite | Cu2Pb6Bi8S19 | Mon. 2/m : _B_2/m |
| 2.JB.25j | Rouxelite | Cu2HgPb23Sb27S65.5 | Mon. 2/m : _B_2/m |
| 2.JB.25f | Ángelaite | Cu2AgPbBiS4 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
| 2.JB.25i | Cuproneyite | Cu7Pb27Bi25S68 | Mon. 2/m : _B_2/m |
| 2.JB.30a | Geocronite | Pb14Sb6S23 | Mon. 2/m : _P_21/m |
| 2.JB.30a | Jordanite | Pb14As6S23 | Mon. 2/m : _P_21/m |
| 2.JB.30b | Kirkiite | Pb10Bi3As3S19 | Mon. 2/m : _P_21/m |
| 2.JB.30c | Tsugaruite | Pb28As15S50Cl | Orth. m _m_2 : P n _n_2 |
| 2.JB.30a | Marcobaldiite | Pb12(Sb3As2Bi)Σ6S21 | Tric. 1 : _P_1 |
| 2.JB.30a | Arsenmarcobaldiite | Pb12(As3.2Sb2.8)Σ6S21 | Tric. 1 : _P_1 |
| 2.JB.35c | Pillaite | Pb9Sb10S23ClO0.5 | Mon. 2/m : _B_2/m |
| 2.JB.35a | Zinkenite | Pb9Sb22S42 | Hex. 6 : _P_63 |
| 2.JB.35b | Scainiite | Pb14Sb30S54O5 | Mon. 2/m : _B_2/m |
| 2.JB.35d | Pellouxite | (Cu,Ag)Pb10Sb12S27O(Cl,S)0.6 | Mon. 2/m : _B_2/m |
| 2.JB.35f | Tubulite | Ag2Pb22Sb20S53 | Mon. m : P b |
| 2.JB.35e | Chovanite | Pb15-2xSb14+2xS36Ox (x ~ 0.2) | Mon. 2/m : _B_2/m |
| 2.JB.40b | Aschamalmite | Pb6-3xBi2+xS9 | Mon. 2/m : _B_2/m |
| 2.JB.40a | Bursaite | Pb5Bi4S11 (?) | Orth. |
| 2.JB.40b | Eskimoite | Ag7Pb10Bi15S36 | Mon. |
| 2.JB.40a | Fizélyite | Ag5Pb14Sb21S48 | Mon. 2/m |
| 2.JB.40a | Gustavite | AgPbBi3S6 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 2.JB.40a | Lillianite | Pb3-2xAgxBi2+xS6 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 2.JB.40c | Ourayite | Ag3Pb4Bi5S13 | Orth. |
| 2.JB.40a | Ramdohrite | Pb5.9Fe0.1Mn0.1In0.1Cd0.2Ag2.8Sb10.8S24 | Mon. 2/m |
| 2.JB.40a | Roshchinite | Ag19Pb10Sb51S96 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
| 2.JB.40d | Schirmerite | PbAgBi3S6 - Pb3Ag1.5Bi3.5S9 | Orth. |
| 2.JB.40a | Treasurite | Ag7Pb6Bi15S32 | Mon. |
| 2.JB.40a | Uchucchacuaite | AgMnPb3Sb5S12 | Orth. m m m _(_2/_m_2/_m_2/m ) : P m m m |
| 2.JB.40e | Ustarasite | Pb(Bi,Sb)6S10 (?) | |
| 2.JB.40a | Vikingite | Ag5Pb8Bi13S30 | Mon. 2/m : _B_2/m |
| 2.JB.40a | Xilingolite | Pb3Bi2S6 | Mon. |
| 2.JB.40b | Heyrovskýite | Pb6Bi2S9 | Orth. m m m _(_2/_m_2/_m_2/m ) : C c c m |
| 2.JB.40 | UM1988-05-S:AgBiCuHgPb | (Hg,Ag,Cu,Pb)5Pb5Bi11S27 | |
| 2.JB.40 | UM1988-06-S:AgBiCuHgPb | (Pb,Hg)12(Cu,Ag)3(Bi,Sb)10(S,Te)27 | |
| 2.JB.40a | Quatrandorite | AgPbSb3S6 | Mon. 2/m : _P_21/b |
| 2.JB.40a | Terrywallaceite | AgPb(Sb,Bi)3S6 | Mon. 2/m : _P_21/b |
| 2.JB.40a | Jasrouxite | Ag16Pb4(Sb24As16)S72 | Tric. 1 : _P_1 |
| 2.JB.40a | Erzwiesite | Ag8Pb12Bi16S40 | Orth. m m m _(_2/_m_2/_m_2/m ) : C m c m |
| 2.JB.40a | Staročeskéite | Ag0.70Pb1.60(Bi1.35Sb1.35)Σ2.70S6 | Orth. m m m _(_2/_m_2/_m_2/m ) : C m c m |
| 2.JB.40a | Oyonite | Ag3Mn2Pb4Sb7As4S24 | Mon. 2/m |
| 2.JB.40a | Holubite | Ag3Pb6(Sb8Bi3)S24 | Mon. 2/m |
| 2.JB.40b | Baiamareite | Ag4Pb12Fe4Sb20S48 | Mon. 2/m |
| 2.JB.40a | Tarutinoite | Ag3Pb7Bi7S19 | Mon. 2/m : _B_2/m |
| 2.JB.55 | Gratonite | Pb9As4S15 | Trig. 3_m_ : R_3_m |
| 2.JB.60 | Marrucciite | Hg3Pb16Sb18S46 | Mon. 2/m : _B_2/m |
| 2.JB.65 | Vurroite | Pb20Sn2(Bi,As)22S54Cl6 | Mon. 2/m : _B_2/b |
| 2.JB.65 | Tazieffite | Pb20Cd2(As,Bi)22S50Cl10 | Mon. 2/m : _B_2/b |
| 2.JB.70 | Daliranite | PbHgAs2S5 | Mon. |
Other InformationHide
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Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for MenchettiiteHide
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References for MenchettiiteHide
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Reference List:
Bindi, L., Keutsch, F. N., Bonazzi, P. (2012) Menchettiite, AgPb2.40Mn1.60Sb3As2S12, a new sulfosalt belonging to the lillianite series from the Uchucchacua polymetallic deposit, Lima Department, Peru. American Mineralogist, 97 (2) 440-446 doi:10.2138/am.2012.3944
Localities for MenchettiiteHide
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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Locality ListHide
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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 
- Good crystals or important locality for species. 
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
| Peru (TL) | |
|---|---|
| Lima Oyón Province Oyón District ⓘ Uchucchacua Mine (TL) | Williams et al. (2011) +1 other reference |