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Famatinite

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Formula:
Cu3SbS4
System:
Tetragonal
Colour:
Deep pinkish brown
Hardness:
3 - 4
Member of:
Name:
From the type locality, Sierra de Famatina, Argentina.

Classification of Famatinite

Approved, 'Grandfathered' (first described prior to 1959)
2.KA.10

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
K : Sulfarsenates, Sulfantimonates
A : Sulfarsenates with (As,Sb)S4 tetrahedra
3.2.2.2

3 : SULFOSALTS
2 : ø = 4
6.3.3

6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
3 : Sulpharsenates and sulphantimonates
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Type Occurrence of Famatinite

Occurrences of Famatinite

Geological Setting:
Low to moderate temperature copper deposits.

Physical Properties of Famatinite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Deep pinkish brown
Streak:
Black
Hardness (Mohs):
3 - 4
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {101}
Distinct on {110}
Fracture:
Irregular/Uneven, Conchoidal
Density:
4.635 g/cm3 (Measured)    4.66 g/cm3 (Calculated)

Crystallography of Famatinite

Crystal System:
Tetragonal
Class (H-M):
4 2m - Scalenohedral
Space Group:
I4 2m
Cell Parameters:
a = 5.38Å, c = 10.76Å
Ratio:
a:c = 1 : 2
Unit Cell Volume:
V 311.44 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Massive, granular, reniform
Twinning:
Polysynthetic

Optical Data of Famatinite

Type:
Anisotropic
Anisotropism:
Strong, greenish yellow and purplish red
Colour in reflected light:
Pale brownish pink
Pleochroism:
Weak
Comments:
Light orange, pink-violet

Chemical Properties of Famatinite

Formula:
Cu3SbS4
All elements listed in formula:
Common Impurities:
Fe,As,Bi

Relationship of Famatinite to other Species

Series:
Forms a series with Luzonite (see here)
Member of:
Other Members of Group:
BriartiteCu2(Fe,Zn)GeS4
ČernýiteCu2(Cd,Zn,Fe)SnS4
FerrokësteriteCu2(Fe,Zn)SnS4
Ge-stannoiditeCu8Fe2ZnGe2S12
HocartiteAg2(Fe2+,Zn)SnS4
KësteriteCu2ZnSnS4
KeutschiteCu2AgAsS4
KuramiteCu3SnS4
LuzoniteCu3AsS4
PermingeatiteCu3SbSe4
Petrukite(Cu,Fe,Zn,Ag)3(Sn,In)S4
PirquitasiteAg2ZnSnS4
StanniteCu2FeSnS4
Unnamed (Cu-Zn-In Sulphide)CuZn2InS4
VelikiteCu2HgSnS4
ZincobriartiteCu2(Zn,Fe)(Ge,Ga)S4
2.KA.05EnargiteCu3AsS4
2.KA.05Petrukite(Cu,Fe,Zn,Ag)3(Sn,In)S4
2.KA.10BriartiteCu2(Fe,Zn)GeS4
2.KA.10LuzoniteCu3AsS4
2.KA.10PermingeatiteCu3SbSe4
2.KA.10BarquilliteCu2CdGeS4
2.KA.15FangiteTl3AsS4

Other Names for Famatinite

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.

References for Famatinite

Reference List:
Stelzner (1873) Min. Mitt.: 242.

vom Rath (1880) Zs. Kr.: 4: 426.

Stevanović (1903), Zs. Kr.: 37: 240.

Shannon (1917): American Journal of Science: 44: 469.

Schneiderhöhn and Ramdohr (1931): 2: 469.

Harcourt (1937): American Mineralogist: 22: 517.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 387-389.

Tanelli, G. (1970): Ricerche sui minerali del gruppo dell'enargite (enargite, stibioenargite, luzonite, famatinite, stibioluzonite). Periodico di mineralogia – Roma, pp. 561-583.

Braga, M. H.; Ferreira, J. A.; Lopes, C.; Malheiros, L. F. (2008): Phase transitions in the Cu-Sb-S system. Materials Science Forum 587-588 (Advanced Materials Forum IV), 435-439.

Internet Links for Famatinite

Localities for Famatinite

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.
Mineral and/or Locality  
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