Putzite Mineral Data

General Putzite Information

Chemical Formula:

(Cu4.7Ag3.3)GeS6

Composition:

Molecular Weight = 925.86 gm

Copper 32.81 % Cu

Silver 39.03 % Ag

Germanium 7.76 % Ge

Sulfur 20.40 % S

______

100.00 %

Empirical Formula:

Cu_4.78Ag_3.35Ge_0.99S_5.89

Environment:

Epithermal veins hosted in rhyolite, ignimbrite and granite. Argentian variety of alpha-Cu8GeS6

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Old dumps near the Rosario vein, Capillitas mining district, Department of Andalgalï¿½, Catamarca Province, Argentina. Link to MinDat.org Location Data.

Name Origin:

Named for Hubert Putz (1973-), who discovered the new species during field work in Catamarca, for his significant contribution to the mineralogy of germanium in the Capillitas depos it.

Synonym:

IMA2002-024

Putzite Image

Images:

Putzite Catamarcaite

Comments: Polished section of putzite (pu) grain in close association with unnamed Cu8Fe2ZnGe2S12 (un1) and catamarcaite (ca), as inclusions in chalcocite-sphalerite (cc/sp) (CanMin 42:1761).
Location: Old dumps near the Rosario vein, Capillitas mining district, Department of AndalgalÃ¡, Catamarca Province, Argentina.. Scale: See Image.
© Canadian Mineralogist

Putzite Crystallography

Cell Dimensions:

a = 10.201, Z = 4; V = 1,061.52 Den(Calc)= 5.79

Crystal System:

Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: F43m

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

By Intensity(I/I_o): 2.943(1)(222), 1.805(0.7)(440), 3.074(0.6)(311),1.962(0.5)(333), 2.083(0.3)(422), 5.896(0.3)(111), 1.725(0.25)(531),

Physical Properties of Putzite

Cleavage:

{???} Distinct

Color:

Iron black.

Diaphaneity:

Opaque

Fracture:

Brittle - Irregular - Very brittle fracture producing irregular fragments

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Vitreous - Metallic

Streak:

black

Optical Properties of Putzite

RL Anisotrophism:

None.

RL Bireflectance:

None.

RL Color:

Pale rose-brownish; no internal reflections.

RL Pleochroism:

None.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Putzite in Air**
λ	R	∑ R(λ)
400 nm	33.50
420 nm	31.60
440 nm	30.60
460 nm	29.40
470 nm	28.90
480 nm	28.60
500 nm	27.80
520 nm	27.20
540 nm	26.70
546 nm	26.50
560 nm	26.30
580 nm	26.00
589 nm	25.80
600 nm	25.70
620 nm	25.40
640 nm	25.30
650 nm	25.30
660 nm	25.20
680 nm	25.20
700 nm	25.20

**Standardized Intensity (100%) Reflection Spectra of Putzite in Oil**
λ	R	∑ R(λ)
400 nm	16.60
420 nm	15.20
440 nm	14.50
460 nm	13.90
470 nm	13.50
480 nm	13.10
500 nm	12.60
520 nm	12.10
540 nm	11.70
546 nm	11.60
560 nm	11.50
580 nm	11.20
589 nm	11.10
600 nm	11.00
620 nm	11.00
640 nm	10.90
650 nm	10.90
660 nm	10.90
680 nm	10.90
700 nm	11.00

**Calculated Relative Intensity Colors of Putzite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	340%
R

**Calculated Relative Intensity Colors of Putzite in Oil**
Relative Intensity	0%	80%	100%	160%	240%	320%	400%	480%	560%	640%	720%	770%
R

Calculated Properties of Putzite

Electron Density:

Bulk Density (Electron Density)=5.28 gm/cc
note: Specific Gravity of Putzite =5.79 gm/cc.

Fermion Index:

Fermion Index = 0.0075858685
Boson Index = 0.9924141315

Photoelectric:

PE_Putzite= 118.80 barns/electron
U=PE_Putzite x rElectron Density= 627.05 barns/cc.

Radioactivity:

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

Putzite Classification

Dana Class:

02.05.10.01 (02)Sulfides - Including Selenides and Tellurides

(02.05)where Am Bn Xp, with (m+n):p=3:2

(02.05.10)Dana Group

02.05.10.01 Putzite! (Cu4.7Ag3.3)GeS6 F43m 4 3m

02.05.10.02 Calvertite! Cu5Ge0.5S4 F m3m, F 432, or F43m Cubic

Strunz Class:

02.BA.35 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1)

02.BA -With Cu, Ag, Au

02.BA.35 Argyrodite Ag8GeS6 Pna2 mm2

02.BA.35 Canfieldite Ag8SnS6 P na2₁ mm2

02.BA.35 Putzite! (Cu4.7Ag3.3)GeS6 F43m 4 3m

Other Putzite Information

References:

NAME( CanMin, 42:1757) PHYS. PROP.(CanMin, 42:1757) OPTIC PROP.(CanMin, 42:1757)

See Also:

Links to other databases for Putzite :
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

Search for Putzite using:

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Print or Cut-and-Paste your Putzite Specimen Label here :

Putzite

(Cu4.7Ag3.3)GeS6
Dana No: 02.05.10.01 Strunz No: 02.BA.35
Locality:

Notes:

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