Briartite
A valid IMA mineral species
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About Briartite
Formula:
Cu2(Fe,Zn)GeS4
Colour:
Gray to gray blue
Hardness:
3½ - 4½
Specific Gravity:
4.337 (Calculated)
Crystal System:
Tetragonal
Member of:
Name:
For Gaston Briart (October 26 1897 - Brussels, June 13 1962), Belgian geologist who studied the Kipushi deposit.
The Fe analogue of zincobriartite.
Often associated with members of the germanite group.
See also 'Ge-stannoidite'.
Often associated with members of the germanite group.
See also 'Ge-stannoidite'.
Unique Identifiers
Mindat ID:
773
Long-form identifier:
mindat:1:1:773:5
GUID
(UUID V4):
(UUID V4):
e920ca2b-4cd5-4494-969c-cce8acc3149d
IMA Classification of Briartite
Approved
IMA Formula:
Cu2FeGeS4
First published:
1965
Classification of Briartite
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
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
K : Sulfarsenates, Sulfantimonates
A : Sulfarsenates with (As,Sb)S4 tetrahedra
2.9.2.3
2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
6.2.2
6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
2 : Sulphogermanates
6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
2 : Sulphogermanates
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Btt | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Btt | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Pronunciation of Briartite
Pronunciation:
Play | Recorded by | Country |
---|---|---|
Jolyon Ralph | United Kingdom |
Physical Properties of Briartite
Transparency:
Opaque
Colour:
Gray to gray blue
Hardness:
3½ - 4½ on Mohs scale
Density:
4.337 g/cm3 (Calculated)
Optical Data of Briartite
Anisotropism:
weak in air, distinct in oil
Reflectivity:
Wavelength | R |
---|---|
400nm | 23.4% |
420nm | 24.2% |
440nm | 25.0% |
460nm | 25.7% |
480nm | 26.4% |
500nm | 27.0% |
520nm | 27.4% |
540nm | 27.6% |
560nm | 27.5% |
580nm | 27.2% |
600nm | 26.8% |
620nm | 26.0% |
640nm | 25.0% |
660nm | 23.8% |
680nm | 22.5% |
700nm | 21.2% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 27.6%.
Colour in reflected light:
Gray to gray-blue
Chemistry of Briartite
Mindat Formula:
Cu2(Fe,Zn)GeS4
Common Impurities:
Ga,Sn
Crystallography of Briartite
Crystal System:
Tetragonal
Cell Parameters:
a = 5.32(1) Å, c = 10.51(1) Å
Ratio:
a:c = 1 : 1.976
Unit Cell V:
297.46 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Small grains
Twinning:
Polysynthetic
Comment:
Point Group: 4mm or 4m2.; Space Group: I41md or I4d2
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Big Balls | Small Balls | Just Balls | Spacefill
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2D | Stereo | Red-Blue | Red-Cyan
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View
CIF File Best | x | y | z | a | b | c
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Rotation
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Labels
Console Off | On | Grey | Yellow
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0014274 | Briartite | Wintenberger M (1979) Etude de la structure cristallographique et magnetique de Cu2FeGeS4 et remarque sur la structure magnetique de Cu2MnSnS4 Materials Research Bulletin 14 1195-1202 | 1979 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.06 Å | (FF) |
1.888 Å | (m) |
1.871 Å | (m) |
1.608 Å | (m) |
1.591 Å | (m) |
2.67 Å | (f) |
1.533 Å | (f) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 3b: Earth’s earliest hydrosphere | >4.45 |
12 : Hadean hydrothermal subsurface sulfide deposits (see also #33) |
Type Occurrence of Briartite
General Appearance of Type Material:
Grains, mostly 0.1-0.3 mm, up to a max of 2 mm.
Place of Conservation of Type Material:
Musée de Minéralogie, Ecole des Mines de Paris, France.
The Natural History Museum, London, England, 1967,271.
Université Catholique de Louvain, Louvain-la-Neuve, Belgium, U309.
The Natural History Museum, London, England, 1967,271.
Université Catholique de Louvain, Louvain-la-Neuve, Belgium, U309.
Geological Setting of Type Material:
Inclusions in Ge bearing minerals
Associated Minerals at Type Locality:
Reference:
Francotte, J., Moreau, J., Ottenburgs, R. (1965) La briartite, Cu2(Fe, Zn)GeS4, une nouvelle espèce minérale. Bulletin de la Société Française de Minéralogie et de Cristallographie: 88: 432-437.
Synonyms of Briartite
Other Language Names for Briartite
Relationship of Briartite to other Species
Member of:
Other Members of this group:
Černýite | Cu2(Cd,Zn,Fe)SnS4 | Tet. 4 2m : I4 2m |
Famatinite | Cu3SbS4 | Tet. 4 2m : I4 2m |
Ferrokësterite | Cu2FeSnS4 | Tet. 4 : I4 |
Hocartite | Ag2(Fe2+,Zn)SnS4 | Tet. 4 2m : I4 2m |
Kësterite | Cu2ZnSnS4 | Tet. 4 : I4 |
Keutschite | Cu2AgAsS4 | Tet. 4 2m : I4 2m |
Kuramite | Cu3SnS4 | Tet. 4 2m : I4 2m |
Luzonite | Cu3AsS4 | Tet. 4 2m : I4 2m |
Omariniite | Cu8Fe2ZnGe2S12 | Orth. 2 2 2 : I2 2 2 |
Permingeatite | Cu3SbSe4 | Tet. 4 2m : I4 2m |
Petrukite | (Cu,Fe,Zn,Ag)3(Sn,In)S4 | Orth. mm2 : Pmn21 |
Pirquitasite | Ag2ZnSnS4 | Tet. 4 : I4 |
Richardsite | Zn2CuGaS4 | Tet. 4 2m : I4 2m |
Stannite | Cu2FeSnS4 | Tet. 4 2m : I4 2m |
Stannoidite | Cu+6Cu2+2(Fe2+,Zn)3Sn2S12 | Orth. 2 2 2 : I2 2 2 |
UM1984-30-S:CuFeSn | Cu2Fe2Sn3S7 | |
Unnamed (Cu-Zn-In Sulphide) | CuZn2InS4 | |
Velikite | Cu2HgSnS4 | Tet. 4 : I4 |
Zincobriartite | Cu2(Zn,Fe)(Ge,Ga)S4 | Tet. 4 2m : I4 2m |
Common Associates
Associated Minerals Based on Photo Data:
19 photos of Briartite associated with Renierite | (Cu1+,Zn)11Fe4(Ge4+,As5+)2S16 |
9 photos of Briartite associated with Tennantite Subgroup | Cu6(Cu4C2+2)As4S12S |
6 photos of Briartite associated with Germanite | Cu13Fe2Ge2S16 |
5 photos of Briartite associated with Chalcopyrite | CuFeS2 |
4 photos of Briartite associated with Sphalerite | ZnS |
3 photos of Briartite associated with Quartz | SiO2 |
2 photos of Briartite associated with Bornite | Cu5FeS4 |
1 photo of Briartite associated with Gallite | CuGaS2 |
Related Minerals - Strunz-mindat Grouping
2.KA.05 | Enargite | Cu3AsS4 |
2.KA.05 | Petrukite | (Cu,Fe,Zn,Ag)3(Sn,In)S4 |
2.KA.10 | Famatinite | Cu3SbS4 |
2.KA.10 | Luzonite | Cu3AsS4 |
2.KA.10 | Permingeatite | Cu3SbSe4 |
2.KA.10 | Barquillite | Cu2CdGeS4 |
2.KA.10 | Keutschite | Cu2AgAsS4 |
2.KA.10 | Zincobriartite | Cu2(Zn,Fe)(Ge,Ga)S4 |
2.KA.15 | Fangite | Tl3AsS4 |
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.
Internet Links for Briartite
mindat.org URL:
https://www.mindat.org/min-773.html
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References for Briartite
Localities for Briartite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
Bulgaria | |
| Sahlström et al. (2017) |
| Bogdanov et al. (2004) |
DR Congo (TL) | |
| Francotte et al. (1965) +3 other references |
Finland | |
| Pavel M. Kartashov analytical data (2019) |
France | |
| Lips (2006) |
| J. W. Anthony et al.: Handbook of Mineralogy (1997) |
| R. Pierrot |
Greece | |
| Rieck et al. (1999) |
Greenland | |
| Horn et al. (2019) |
Namibia | |
| Gramaccioli +5 other references |
Romania | |
| Hirtopanu (2006) |
Spain | |
| Morales Ruano et al. (1996) |
| A. Paniagua et al. |
| Revista de minerales (Mars) |
Pascua et al. (1997) | |
USA | |
| Eckel et al. (1997) |
Zambia | |
| Kamona et al. (1999) +2 other references |
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Kipushi Mine, Kipushi, Kipushi Territory, Haut-Katanga, DR Congo