Briartite Mineral Data

Briartite Mineral Data +

[Newest Minerals] [Mineral Auctions] [Mineral Gallery]
The Mineral Gallery's Exceptional Specimens and Mineral Hall of Fame
Visa, PayPal, and Mastercard are Welcomed

General Briartite Information

Chemical Formula:

Cu2(Zn,Fe)GeS4

Composition:

Molecular Weight = 390.97 gm

Zinc 12.54 % Zn

Iron 3.57 % Fe

Copper 32.51 % Cu

Germanium 18.57 % Ge

Sulfur 32.81 % S

______

100.00 %

Empirical Formula:

Cu₂Zn_0.75Fe²⁺_0.25GeS₄

Environment:

As inclusions in other Ge-Ga-bearing sulfides.

IMA Status:

Approved IMA 1965

Locality:

From Kipushi, Shaba Province, Zaire. Link to MinDat.org Location Data.

Name Origin:

For Gaston Briart, who studied the Kipushi deposit.

Synonym:

ICSD 47165

PDF 26-527

Search for Briartite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Briartite Crystallography

Axial Ratios:

a:c = 1:1.97556

Cell Dimensions:

a = 5.32, c = 10.51, Z = 2; V = 297.46 Den(Calc)= 4.36

Crystal System:

Tetragonal - ScalenohedralH-M Symbol (4 2m) Space Group: I 42m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.06(1), 1.87(0.5), 1.89(0.5),

Physical Properties of Briartite

Color:

Blue gray, Gray, Iron gray.

Density:

4.5

Diaphaniety:

Opaque

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Metallic

Optical Properties of Briartite

RL Anisotrophism:

Weak in air, distinct in oil.

RL Color:

Gray to gray blue.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Briartite in Air**
λ	R	∑ R(λ)
400 nm	23.40
420 nm	24.20
440 nm	25.00
460 nm	25.70
480 nm	26.40
500 nm	27.00
520 nm	27.40
540 nm	27.60
560 nm	27.50
580 nm	27.20
600 nm	26.80
620 nm	26.00
640 nm	25.00
660 nm	23.80
680 nm	22.50
700 nm	21.20

**Calculated Relative Intensity Colors of Briartite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	350%
R

Calculated Properties of Briartite

Electron Density:

r_electron=4.08 gm/cc
note: r_Briartite=4.36 gm/cc.

Fermion Index

Fermion Index = 0.02284
Boson Index = 0.97716

Photoelectric:

PE_Briartite= 35.41 barns/electron
U=PE_Briartite x r_electron= 144.54 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Briartite is Not Radioactive

Briartite Classification

Dana Class:

2.9.2.3 (2)Sulfides - Including Selenides and Tellurides

(2.9)where Am Bn Xp, with (m+n):p=1:1

(2.9.2)Stannite Group (Tetragonal: I4¯2m) A2BCS type

2.9.2.1 Stannite Cu2FeSnS4 I 42m 4 2m

2.9.2.2 Cernyite Cu2CdSnS4 I 42m 4 2m

2.9.2.3 Briartite Cu2(Zn,Fe)GeS4 I 42m 4 2m

2.9.2.4 Kuramite Cu3SnS4 I 42m 4 2m

2.9.2.5 Sakuraiite (Cu,Zn,Fe,In,Sn)4S4 P 4₃2, P 43m, or P m3m Cubic

2.9.2.6 Hocartite Ag2FeSnS4 I 42m 4 2m

2.9.2.7 Pirquitasite Ag2ZnSnS4 I 42m 4 2m

2.9.2.8 Velikite Cu2HgSnS4 I 42m 4 2m

2.9.2.9 Kesterite Cu2(Zn,Fe)SnS4 I 4 4

2.9.2.10 Ferrokesterite Cu2(Fe,Zn)SnS4 I 42m 4 2m

2.9.2.11 Barquillite! Cu2CdGeS4 I 42m 4 2m

Strunz Class:

II/C.06-40 II - Sulfides and sulphosalts

II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1

II/C.06 - Stannite group

II/C.06-10 Luzonite Cu3AsS4 I 42m 4 2m

II/C.06-20 Famatinite Cu3SbS4 I 42m 4 2m

II/C.06-30 Permingeatite Cu3SbSe4 I 42m 4 2m

II/C.06-40 Briartite Cu2(Zn,Fe)GeS4 I 42m 4 2m

II/C.06-45 Barquillite! Cu2CdGeS4 I 42m 4 2m

II/C.06-50 Kuramite Cu3SnS4 I 42m 4 2m

II/C.06-60 Stannite Cu2FeSnS4 I 42m 4 2m

II/C.06-70 Ferrokesterite Cu2(Fe,Zn)SnS4 I 42m 4 2m

II/C.06-80 Kesterite Cu2(Zn,Fe)SnS4 I 4 4

II/C.06-90 Cernyite Cu2CdSnS4 I 42m 4 2m

II/C.06-100 Velikite Cu2HgSnS4 I 42m 4 2m

II/C.06-110 Hocartite Ag2FeSnS4 I 42m 4 2m

II/C.06-120 Pirquitasite Ag2ZnSnS4 I 42m 4 2m

II/C.06-130 Sakuraiite (Cu,Zn,Fe,In,Sn)4S4 P 4₃2, P 43m, or P m3m Cubic

II/C.06-140 Petrukite (Cu,Fe,Zn)2(Sn,In)S4 P mn2₁ mm2

II/C.06-150 Rhodostannite Cu2FeSn3S8 I 4₁/a 4/m

II/C.06-160 Toyohaite Ag2FeSn3S8 I 4₁/a 4/m

Other Briartite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Briartite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Briartite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Briartite :

AA Mineral Specimens

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

MineralsWeb Fine Minerals

The GeoZone

Wrights Rock Shop

Translate Briartite Mineral Data :

Ask about Briartite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Briartite Specimen Label here :

Briartite

Cu2(Zn,Fe)GeS4
Dana No: 2.9.2.3 Strunz No: II/C.06-40
Locality:

Notes: