Putzite (original) (raw)

Colour:

Iron-black with a weak violet tint

Specific Gravity:

5.788 (Calculated)

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.

Long-form identifier:

mindat:1:1:26707:2

6c5cde17-3cc5-4a83-b616-1838dec1bf67

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

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Colour:

Iron-black with a weak violet tint

Hardness:

VHN100=183 - 201 (50 s test time) - Vickers

Cleavage:

Distinct/Good
Distinct in polished sections

Fracture:

Irregular/Uneven, Splintery, Sub-Conchoidal

Density:

5.788 g/cm3 (Calculated)

Reflectivity:

Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 33.50%.

Colour in reflected light:

Pale rose to pale violet

Internal Reflections:

None

Mindat Formula:

(Cu4.7Ag3.3)GeS6

Class (H-M):

43_m_ - Hextetrahedral

Cell Parameters:

a = 10.201 Å, b = 10.201 Å, c = 10.201 Å

Unit Cell V:

1,061.52 ų (Calculated from Unit Cell)

Morphology:

Aggregates of anhedral grains, up to 3 X 1 mm.

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ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0005995	Putzite	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 The Canadian Mineralogist 42 1757-1769		2004	Capillitas, Catamarca, Argentina	0	293

CIF Raw Data - click here to close

Powder Diffraction Data:

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.

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.

Place of Conservation of Type Material:

Division of Mineralogy, University of Salzburg, Austria (14835-14837).
Systematic References Series, National Mineral Collection of Canada, Geological Survey of Canada, Ottawa, Canada (NMCC 68096).
Laboratory for Chemical and Mineralogical Crystallography, University of Bern, Switzerland.

Geological Setting of Type Material:

Capillitas diatreme located within the Farallón Negro volcanic complex.

Associated Minerals at Type Locality:

Other Members of this group:

Associated Minerals Based on Photo Data:

Health Risks:

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

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.

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.