Mazzettiite Mineral Data

General Mazzettiite Information

Chemical Formula:

Ag3HgPbSbTe5

Composition:

Molecular Weight = 1,493.72 gm

Silver 21.59 % Ag

Mercury 13.56 % Hg

Antimony 8.07 % Sb

Tellurium 42.63 % Te

Lead 14.15 % Pb

______

100.00 %

Empirical Formula:

Ag_2.99Hg_1.01Pb_1.02Sb_0.99Te_4.99

Environment:

Closely associated with altaite together with galena in a gangue of quartz. Strong similarities with petrovicite

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Findlay Gulch, Saguache Co., Colorado, USA Link to MinDat.org Location Data.

Name Origin:

Named for Giuseppe Mazzetti (1942–2003), curator in chief of the Mineralogy Section of the Museo di Storia Naturale, Università di Firenze.

Synonym:

IMA2004-003

Mazzettiite Image

Images:

Mazzettiite

Comments: Back-scattered electron photograph (SEM) of mazzettiite (M), associated with altaite (A), galena (G) and quartz (Q).
Location: Museum specimen in the Mineralogical Collection of the Institut royal des Sciences naturelles de Belgique, Bruxelles (Belgium). Findlay Gulch, Saguache Co., Colorado, USA. Scale: See Image.
© Canadian Mineralogist

Mazzettiite Crystallography

Axial Ratios:

a:b:c =1.1173:1:0.3052

Cell Dimensions:

a = 16.495, b = 14.762, c = 4.506, Z = 4; V = 1,097.21 Den(Calc)= 9.04

Crystal System:

OrthorhombicSpace Group: P na2₁ or Pnam

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.01(1)(520), 2.754(0.6)(440), 3.17(0.6)(430),3.65(0.6)(330), 1.806(0.55)(561), 2.137(0.5), 3.26(0.5)(131), 2.317(0.45)(122), 3.6(0.4),

Physical Properties of Mazzettiite

Cleavage:

None

Color:

Light gray.

Diaphaneity:

Opaque

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Metallic

Streak:

black

Optical Properties of Mazzettiite

Optical Data:

NCalc= 2.5 - from Gladstone-Dale relationship (KC = 0.1664) where Ncalc=Dcalc*KC+1

RL Anisotrophism:

Moderate.

RL Bireflectance:

Weakly to moderately.

RL Color:

Light gray with no internal reflections.

RL Pleochroism:

Weakly from slightly greenish gray to darker greenish gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Mazzettiite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	45.10	45.40
420 nm	45.20	45.70
440 nm	45.40	45.90
460 nm	45.60	46.10
470 nm	45.60	46.10
480 nm	45.90	46.30
500 nm	45.90	46.40
520 nm	46.00	46.40
540 nm	46.00	46.50
546 nm	46.10	46.60
560 nm	46.20	46.60
580 nm	46.30	47.00
589 nm	46.30	47.00
600 nm	46.40	47.00
620 nm	46.40	47.10
640 nm	46.50	47.20
650 nm	46.40	47.10
660 nm	46.30	47.00
680 nm	46.20	46.90
700 nm	46.00	46.80

**Calculated Relative Intensity Colors of Mazzettiite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	200%
R₁
R₂

Calculated Properties of Mazzettiite

Electron Density:

Bulk Density (Electron Density)=7.44 gm/cc
note: Specific Gravity of Mazzettiite =9.04 gm/cc.

Fermion Index:

Fermion Index = 0.1
Boson Index = 0.9

Photoelectric:

PE_Mazzettiite= 744.30 barns/electron
U=PE_Mazzettiite x rElectron Density=5,540.02 barns/cc.

Radioactivity:

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

Mazzettiite Classification

Dana Class:

03.01.09.02 (03)Sulfides - Sulfosalts

(03.01)where z/y > 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.01.09)Dana Group

03.01.09.01 Petrovicite PbHgCu3BiSe5 Pnam 2/m 2/m 2/m

03.01.09.02 Mazzettiite! Ag3HgPbSbTe5 P na2₁ or Pnam Ortho

Strunz Class:

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

02.L - Unclassified Sulfosalts

02.LB -With essential Pb

02.LB.40 Petrovicite PbHgCu3BiSe5 Pnam 2/m 2/m 2/m

02.LB.40 Mazzettiite! Ag3HgPbSbTe5 P na2₁ or Pnam Ortho

Other Mazzettiite Information

References:

NAME( CanMin, 42:1739) PHYS. PROP.(CanMin, 42:1739) OPTIC PROP.(CanMin, 42:1739)

See Also:

Links to other databases for Mazzettiite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Ask about Mazzettiite here :
Ask-A-Mineralogist from the Mineralogical Society of America
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Print or Cut-and-Paste your Mazzettiite Specimen Label here :

Mazzettiite

Ag3HgPbSbTe5
Dana No: 03.01.09.02 Strunz No: 02.LB.40
Locality:

Notes: