Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportAdd Glossary Item
StatisticsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Tennantite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
Cu6[Cu4(Fe,Zn)2]As4S13
System:
Isometric
Colour:
Grey-black, steel-gray, ...
Lustre:
Metallic
Hardness:
3 - 4½
Name:
Re-named in 1819 by William Phillips in honor of Smithson Tennant [November 30, 1761 Selby, Yorkshire, England, United Kingdom - February 22, 1815 Boulogne-sur-Mer, France] English chemist of independent means. Tennant established the beneficial nature of using limestone to reduce soil acidity. He and William Hyde Wollaston, who was then his chemical assistant, analyzed graphite and diamond and found that graphite and diamond were both carbon. He analyzed meteorites and found nickel in them, as well as finding iodine in sea water. Tennant's fame, however, is firmly based on his discovery of the elements iridium and osmium. Previously called "gray sulphuret of copper in dodecahedral crystals" in 1817 by James Sowerby.

Classification of Tennantite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
2.GB.05

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
B : Neso-sulfarsenites, etc. with additional S
3.3.6.2

3 : SULFOSALTS
3 : 3 <ø < 4
5.1.2

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
1 : Sulpharsenites etc. of Cu
mindat.org URL:
http://www.mindat.org/min-3911.html
Please feel free to link to this page.

Type Occurrence of Tennantite

Year of Discovery:
1819

Occurrences of Tennantite

Geological Setting:
Hydrothermal veins and contact metamorphic deposits.

Physical Properties of Tennantite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Grey-black, steel-gray, iron-gray, black
Streak:
Reddish grey, black, red-brown
Hardness (Mohs):
3 - 4½
Hardness (Vickers):
VHN100=294 - 380 kg/mm2
Tenacity:
Brittle
Fracture:
Sub-Conchoidal
Density:
4.62 g/cm3 (Measured)    4.61 g/cm3 (Calculated)

Crystallography of Tennantite

Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
I4 3m
Cell Parameters:
a = 10.19Å
Unit Cell Volume:
V 1,058.09 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Tetrahedral to rounded crystals.
Twinning:
Twin axis [111], twin plane {111}

Crystallographic forms of Tennantite

Crystal Atlas:
Image Loading
Click on an icon to view
Tennantite - {100}, modified
3d models and HTML5 code kindly provided by www.smorf.nl.

Toggle
Edge Lines | Miller Indicies | Axes

Transparency
Opaque | Translucent | Transparent

View
Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation

Epitaxial Relationships of Tennantite

Epitaxial Minerals:
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Tennantite

Type:
Isotropic
Colour in reflected light:
gray, inclining to black to brown to cherry-red
Comments:
n greater than 2.72

Chemical Properties of Tennantite

Formula:
Cu6[Cu4(Fe,Zn)2]As4S13
Idealised Formula:
(Cu,Ag,Fe,Zn)12As4S13
Essential elements:
All elements listed in formula:
Common Impurities:
Sb,Bi,Pb

Relationship of Tennantite to other Species

Series:
Forms a series with Tetrahedrite (see here)
Other Members of Group:
ArgentotennantiteAg6[Cu4(Fe,Zn)2]As4S13
ArgentotetrahedriteAg10(Fe,Zn)2Sb4S13
FreibergiteAg6[Cu4Fe2]Sb4S13-x
GirauditeCu6[Cu4(Fe,Zn)2]As4Se13
GoldfielditeCu10Te4S13
HakiteCu6[Cu4Hg2]Sb4Se13
TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
2.GB.05ArgentotennantiteAg6[Cu4(Fe,Zn)2]As4S13
2.GB.05FreibergiteAg6[Cu4Fe2]Sb4S13-x
2.GB.05GirauditeCu6[Cu4(Fe,Zn)2]As4Se13
2.GB.05GoldfielditeCu10Te4S13
2.GB.05HakiteCu6[Cu4Hg2]Sb4Se13
2.GB.05TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
2.GB.10SelenostephaniteAg5Sb(Se,S)4
2.GB.10StephaniteAg5SbS4
2.GB.15Pearceite[(Ag,Cu)6(As,Sb)2S7][Ag9CuS4]
2.GB.15Polybasite[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
2.GB.15UM2003-14-S:AgBiFeTeAg16FeBiTe3S8
2.GB.15Selenopolybasite[(Ag,Cu)6(Sb,As)2(S,Se)7][Ag9Cu(S,Se)2Se2]
2.GB.15Cupropearceite[Cu6As2S7][Ag9CuS4]
2.GB.15Cupropolybasite[Cu6Sb2S7][Ag9CuS4]
2.GB.15UM1979-17-S:BiCuFeCu18Fe4BiS16
2.GB.20Galkhaite(Cs,Tl)(Hg,Cu,Zn)6(As,Sb)4S12
5.1.1SinneriteCu6As4S9
5.1.4ChalcostibiteCuSbS2
5.1.5TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
5.1.6GoldfielditeCu10Te4S13
5.1.7EmplectiteCuBiS2
5.1.8CuprobismutiteCu8AgBi12S24
5.1.9WitticheniteCu3BiS3
5.1.10HodrušiteCu8Bi12S22
5.1.11GirauditeCu6[Cu4(Fe,Zn)2]As4Se13
5.1.11PermingeatiteCu3SbSe4

Other Names for Tennantite

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 Tennantite

Reference List:
Zeitschrift für Kristallographie (1966): 123: 1-20.

Kharbish, S., Libowitzky, E. and Beran, A. (2007): The effect of As-Sb substitution in the Raman spectra of tetrahedrite-tennantite and pyrargyrite-proustite solid solutions. European Journal of Mineralogy, 19, 567-574.

Pervukhina, N.V., Borisov, S.V., Magarill, S.A., Vasuliev, V.I., Kuratieva, N.V., Kozlova, D.G. (2010): Refinement of the crystal structure of As-"schwatzite" Cu6(Cu6Hg0.75)(As2.83Sb1.17)S13 (Aktash, Altai mountains). Journal of Structural Chemistry, 51, 898-903

Internet Links for Tennantite

Specimens:
The following Tennantite specimens are currently listed for sale on minfind.com.

Localities for Tennantite

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  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2015, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: August 5, 2015 07:27:13 Page generated: August 2, 2015 22:40:59