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Putzite

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Dr Hubert Putz in the 'Fensterstollen'
Formula:
(Cu4.7Ag3.3)GeS6
Colour:
Iron-black with a weak violet tint
Lustre:
Metallic
Hardness:
3 - 3½
Specific Gravity:
5.788 (Calculated)
Crystal System:
Isometric
Name:
In honour of Dr Hubert Putz (1973- ), University of Salzburg, who discovered the new species during field work in Catamarca, and for his significant contributions to the mineralogy of germanium in the Capillitas deposit.
This page provides mineralogical data about Putzite.


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Classification of PutziteHide

Approved
Approval Year:
2002
2.BA.70

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
A : With Cu, Ag, Au

Physical Properties of PutziteHide

Metallic
Transparency:
Opaque
Colour:
Iron-black with a weak violet tint
Streak:
Black
Hardness:
3 - 3½ on Mohs scale
Hardness:
VHN100=183 - 201 (50 s test time) - Vickers
Tenacity:
Brittle
Cleavage:
Distinct/Good
Distinct in polished sections
Fracture:
Irregular/Uneven, Splintery, Sub-Conchoidal
Density:
5.788 g/cm3 (Calculated)

Optical Data of PutziteHide

Type:
Isotropic
Colour in reflected light:
Pale rose to pale violet
Internal Reflections:
None

Chemical Properties of PutziteHide

Formula:
(Cu4.7Ag3.3)GeS6
IMA Formula:
(Cu,Ag)8GeS6

Crystallography of PutziteHide

Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
F4 3m
Cell Parameters:
a = 10.201 Å, b = 10.201 Å, c = 10.201 Å
Ratio:
a:b:c = 1 : 1 : 1
Unit Cell V:
1,061.52 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Aggregates of anhedral grains, up to 3 X 1 mm.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.896 (30)
3.074 (60)
2.943 (100)
2.083 (30)
1.962 (50)
1.805 (70)
1.725 (25)
Comments:
The crystal structure of putzite was solved by direct methods to an R index of 5.97% for 259 observed reflections measured with MoKα X-radiation. Close metal–metal contacts indicate Cu,Ag disorder. The structure description is based on regular polyhedra such as GeS4, SCu6, SAg12 and SCu12, instead of the conventional discussion of various two-, three-, or four-fold coordinations around (disordered) Ag and Cu.

Type Occurrence of PutziteHide

General Appearance of Type Material:
Putzite occurs as aggregates of anhedral grains, up to 3 × 1 mm, embedded in a matrix of predominantly chalcocite with relics of bornite.
Geological Setting of Type Material:
Capillitas diatreme located within the Farallón Negro volcanic complex.
Associated Minerals at Type Locality:

Synonyms of PutziteHide

Other Language Names for PutziteHide

Simplified Chinese:硫锗银铜矿
Traditional Chinese:硫鍺銀銅礦

Relationship of Putzite to other SpeciesHide

Other Members of this group:
AlburniteAg8GeTe2S4Iso.
ArgyroditeAg8GeS6Orth. mm2 : Pna21
CanfielditeAg8SnS6Orth. mm2
SpryiteAg8(As3+0.5As5+0.5)S6Orth. mm2 : Pna21

Related Minerals - Nickel-Strunz GroupingHide

2.BA.AlburniteAg8GeTe2S4Iso.
2.BA.DzierżanowskiteCaCu2S2Trig. 3m (3 2/m) : P3m1
2.BA.05ChalcociteCu2SMon. 2/m : P21/b
2.BA.05DjurleiteCu31S16Mon. 2/m
2.BA.05GeeriteCu8S5Trig. 3
2.BA.05RoxbyiteCu9S5Tric. 1 : P1
2.BA.10AniliteCu7S4Orth. mmm (2/m 2/m 2/m) : Pnma
2.BA.10DigeniteCu9S5Trig. 3m (3 2/m) : R3m
2.BA.15BorniteCu5FeS4Orth. mmm (2/m 2/m 2/m) : Pbca
2.BA.20BellidoiteCu2SeTet. 4/m : P42/n
2.BA.20BerzelianiteCu2SeIso. m3m (4/m 3 2/m) : Fm3m
2.BA.25AthabascaiteCu5Se4Orth.
2.BA.25UmangiteCu3Se2Tet.
2.BA.30RickarditeCu7Te5Orth.
2.BA.30WeissiteCu2-xTeHex.
2.BA.35AcanthiteAg2SMon. 2/m : P21/m
2.BA.40MckinstryiteAg5-xCu3+xS4Orth. mmm (2/m 2/m 2/m) : Pnma
2.BA.40StromeyeriteAgCuSOrth. mmm (2/m 2/m 2/m)
2.BA.40dUM2003-13-S:AgAuCuAg6AuCu2S5
2.BA.45JalpaiteAg3CuS2Tet.
2.BA.45SelenojalpaiteAg3CuSe2Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
2.BA.50EucairiteAgCuSeOrth.
2.BA.55AguilariteAg4SeSMon. 2/m
2.BA.55NaumanniteAg2SeOrth. 2 2 2 : P21 21 21
2.BA.60CervelleiteAg4TeSMon. 2/m
2.BA.60HessiteAg2TeMon. 2/m : P21/b
2.BA.60ChenguodaiteAg9Fe3+Te2S4Orth.
2.BA.65Henryite(Cu,Ag)3+xTe2 , with x ~ 0.40 Iso. m3m (4/m 3 2/m) : Fd3c
2.BA.65StütziteAg5-xTe3, x = 0.24-0.36Hex. 6 : P6
2.BA.70ArgyroditeAg8GeS6Orth. mm2 : Pna21
2.BA.70CanfielditeAg8SnS6Orth. mm2
2.BA.75FischesseriteAg3AuSe2Iso. 4 3 2 : I41 3 2
2.BA.75Penzhinite(Ag,Cu)4Au(S,Se)4Hex.
2.BA.75PetrovskaiteAuAg(S,Se)Mon.
2.BA.75PetziteAg3AuTe2Iso. 4 3 2 : I41 3 2
2.BA.75UytenbogaardtiteAg3AuS2Trig. 3m (3 2/m) : R3c
2.BA.80Bezsmertnovite(Au,Ag)4Cu(Te,Pb)Orth.
2.BA.80BilibinskitePbCu2Au3Te2Iso.
2.BA.80Bogdanovite(Au,Te,Pb)3(Cu,Fe)Iso.

Other InformationHide

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

References for PutziteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Paar, W.H., Roberts, A.C., Berlepsch, P., Armbruster, T., Topa, D., Zagler, G. (2004): Putzite, (Cu4.7Ag3.3)8GeS6, a new mineral species from Capillitas, Catamarca, Argentina: description and crystal structure. Canadian Mineralogist 42, 1757-1769.

Internet Links for PutziteHide

Localities for PutziteHide

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

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Argentina (TL)
 
  • Catamarca
    • Andalgalá Department
Paar, W., Roberts, A.C., Topa, D., Zagler, G., Berlepsch, P., Armbruster, Th. (2004): Putzite, (Cu4.7 Ag3.3)8 GeS6, a new mineral species from Capillitas, Catamarca, Argentina: description and crystal structure. Canadian Mineralogist: 42: 1757-1769.; DE BRODTKORB, Milka K. Precious metaltellurides and other Te-bearing minerals in different paragenesis of Argentina: A review. Rev. Asoc. Geol. Argent. [online]. 2009, vol.64, n.3, pp. 365-372.; Hubert, P., Werner, H., & Dan, T. (2009). A contribution to the knowledge of the mineralization at Mina Capillitas, Catamarca. Revista de la Asociacion Geologica Argentina, 64(3), 514-524.
PUTZ, Hubert; PAAR, Werner H and TOPA, Dan. A contributionto the knowledge of the mineralization at mina Capillitas, Catamarca. Rev. Asoc. Geol. Argent. [online]. 2009, vol.64, n.3, pp. 514-524.
Mineral and/or Locality  
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