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Mazzettiite
A valid IMA mineral species
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Formula:
Ag3HgPbSbTe5
Lustre:
Metallic
Hardness:
3 - 3½
Specific Gravity:
9.04 (Calculated)
Crystal System:
Orthorhombic
Name:
For Giuseppe Mazzetti (1942-2003), curator in chief Mineralogy section, Museo di Storia Naturale, Universita di Firenze.
This page provides mineralogical data about Mazzettiite.
Unique Identifiers
Mindat ID:
27205
Long-form identifier:
mindat:1:1:27205:6
IMA Classification of Mazzettiite
Approved
IMA Formula:
Ag1+3Hg2+Pb2+Sb3+Te2-5
Approval year:
2004
First published:
2004
Approval history:
2004–03
Classification of Mazzettiite
2.LB.40
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
L : Unclassified Sulfosalts
B : With essential Pb
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
L : Unclassified Sulfosalts
B : With essential Pb
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Mzt | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Mazzettiite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Mazzettiite
Metallic
Transparency:
Opaque
Streak:
Black
Hardness:
3 - 3½ on Mohs scale
Hardness:
VHN25=96 - 106 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Density:
9.04 g/cm3 (Calculated)
Comment:
Could not be measured due to small grain size.
Optical Data of Mazzettiite
Anisotropism:
Moderate
Bireflectance:
Weak to moderate
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 400nm | 45.1% | 45.4% |
| 420nm | 45.2% | 45.7% |
| 440nm | 45.4% | 45.9% |
| 460nm | 45.6% | 46.1% |
| 470nm | 45.6% | 46.1% |
| 480nm | 45.9% | 46.3% |
| 480nm | 45.9% | 46.3% |
| 500nm | 45.9% | 46.4% |
| 520nm | 46.0% | 46.4% |
| 540nm | 46.0% | 46.5% |
| 546nm | 46.1% | 46.6% |
| 560nm | 46.2% | 46.6% |
| 580nm | 46.3% | 47.0% |
| 589nm | 46.3% | 47.0% |
| 600nm | 46.4% | 47.0% |
| 620nm | 46.4% | 47.1% |
| 640nm | 46.5% | 47.2% |
| 650nm | 46.4% | 47.1% |
| 660nm | 46.3% | 47.0% |
| 680nm | 46.4% | 46.9% |
| 700nm | 46.0% | 46.8% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 47.2%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Light grey
Internal Reflections:
None
Pleochroism:
Weak
Comments:
Greenish gray to a slightly darker bluish gray
Chemistry of Mazzettiite
Mindat Formula:
Ag3HgPbSbTe5
Element Weights:
Crystallography of Mazzettiite
Crystal System:
Orthorhombic
Cell Parameters:
a = 16.495(6) Å, b = 14.762(7) Å, c = 4.506(2) Å
Ratio:
a:b:c = 1.117 : 1 : 0.305
Unit Cell V:
1,097.21 ų (Calculated from Unit Cell)
Z:
4
Comment:
Point Group: mm2 or 2/m 2/m 2/m.; Space Group: Pna21 or Pnam.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.65 Å | (60) |
| 3.60 Å | (40) |
| 3.26 Å | (50) |
| 3.17 Å | (60) |
| 3.01 Å | (100) |
| 2.754 Å | (60) |
| 2.316 Å | (45) |
| 2.137 Å | (50) |
| 1.806 Å | (55) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Mazzettiite
General Appearance of Type Material:
Anhedral to subhedral grains, to 200 μm.
Place of Conservation of Type Material:
Museo di Storia Naturale, Università di Firenze, Italy, 2951/I.
Institut Royal des Sciences Naturelles de Belgique, V/876.
Institut Royal des Sciences Naturelles de Belgique, V/876.
Geological Setting of Type Material:
Hydrothermal telluride deposit.
Associated Minerals at Type Locality:
Synonyms of Mazzettiite
Other Language Names for Mazzettiite
Related Minerals - Strunz-mindat Grouping
| 2.LB. | Ciriottiite | Cu(Cu,Ag)3Pb19(Sb,As)22(As2)S56 |
| 2.LB. | Hayyanite | Cu5Ag11Pb76Sb71As17(As2+)8S224 |
| 2.LB. | Wenqingite | Pb5(AsS3)2(Ge2S6) |
| 2.LB.05 | Miharaite | Cu4FePbBiS6 |
| 2.LB.30 | Launayite | Cu2Pb20(Sb,As)26S60 |
| 2.LB.30 | Ardaite | Pb19Sb13S35Cl7 |
| 2.LB.30 | Sorbyite | CuPb9(Sb,As)11S26 |
| 2.LB.30 | Playfairite | Pb16(Sb,As)19S44Cl |
| 2.LB.30 | Sterryite | Cu(Ag,Cu)3Pb19(Sb,As)22(As2)S56 |
| 2.LB.30 | Madocite | Pb19(Sb,As)16S43 |
| 2.LB.35 | Larosite | (Cu,Ag)21PbBiS13 |
| 2.LB.40 | Petrovicite | Cu3HgPbBiSe5 |
| 2.LB.45 | Crerarite | Pt2-x(Bi,Pb)11(S,Se)11 |
| 2.LB.50 | Quijarroite | Cu6HgPb2Bi4Se12 |
| 2.LB.55 | Znamenskyite | Pb4In2Bi4S13 |
Other Information
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 Mazzettiite
mindat.org URL:
https://www.mindat.org/min-27205.html
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