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Menchettiite

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Formula:
AgPb
 
2.40
Mn
 
1.60
Sb
 
3
As
 
2
S
 
12
System:MonoclinicColour:Black
Hardness:2½ - 3
Name:
Named in honour of Silvio Menchetti (1937–), Professor of Mineralogy and Crystallography at the University of Florence.


New species belonging to the lillianite series.

Classification of Menchettiite

IMA status:Approved 2011
mindat.org URL:http://www.mindat.org/min-41603.html
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Type Occurrence of Menchettiite

Type Locality:Uchucchacua Mine, Oyon Province, Lima Department, Peru

Physical Properties of Menchettiite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Black
Streak:Black
Hardness (Mohs):2½ - 3
Tenacity:Brittle
Fracture:Irregular/Uneven
Density (calculated):5.146 g/cm3

Crystallography of Menchettiite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Cell Parameters:a = 19.233(2) Å
β = 2°
Unit Cell Volume:V 2059.4 ų
Comment:Space group P21/n.
X-Ray Powder Diffraction:
d-spacingIntensity
3.4066 (39)
3.4025 (39)
3.2853 (100)
2.8535 (50)
2.8519 (47)
2.1190 (33)

Chemical Properties of Menchettiite

Formula:
AgPb
 
2.40
Mn
 
1.60
Sb
 
3
As
 
2
S
 
12
Essential elements:Ag, As, Mn, Pb, S, Sb
All elements listed in formula:Ag, As, Mn, Pb, S, Sb

Other Names for Menchettiite

Synonyms:
IMA2011-009
Other Languages:

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Menchettiite

Reference List:

- +
http://www.geoitalia.org/index.php?action=folder_list〈=it&folder_id=297

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.

Internet Links for Menchettiite

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    • Localities for Menchettiite

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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Peru
     
    • Lima Department
      • Oyon Province
    		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.
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