Bartonite Mineral Data

Bartonite Mineral Data
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General Bartonite Information

Help on Chemical Formula: Chemical Formula: K3Fe10S14
Help on Composition: Composition: Molecular Weight = 1,124.69 gm
   Potassium  10.43 %  K
   Iron       49.66 %  Fe
   Sulfur     39.92 %  S
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: K3Fe2+10S14
Help on Environment: Environment: In clots with other sulfides and silicates in an alkalic diatreme which intruded Franciscan rocks.
Help on IMA Status: IMA Status: Approved IMA 1981
Help on Locality: Locality: Coyote Peak diatreme, 16 miles SW of Orick, Humboldt Co. California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Paul B. Barton, Jr., sulfide petrologist with the U.S. Geological Society.
Help on Name Pronunciation: Name Pronunciation: Bartonite + Pronunciation Say BARTONITE
Help on Synonym: Synonym: ICSD 100746
  PDF 35-476
 

Bartonite Image

Click Here for Larger Bartonite Image in a New Browser Window Images:
Click Here for Larger Bartonite Image

Bartonite

Comments: B&W polished section image showing an irregular remnant of bright pyrrhotite (py) in a matrix of bartonite (ba) veined by silicates. (AmMin, v66:369).
Location: Found in a mafic, alkalic diatreme at Coyote Peak, Humboldt County, California, USA. Scale: Picture Size 1.3? x 1.94 mm.
© American Mineralogist

Bartonite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:1.9787
Help on Cell Dimensions: Cell Dimensions: a = 10.424, c = 20.626, Z = 4; V = 2,241.22 Den(Calc)= 3.33
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.998(1), 5.99(0.77), 1.833(0.4),
Click Here for Large Bartonite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
 Help on Above


Evans H T , Clark J R , American Mineralogist , 66 (1981) p.376-384, The crystal structure of bartonite, a potassium iron sulfide, and its, relationship to pentlandite and djerfisherite

 

Physical Properties of Bartonite

Help on Cleavage: Cleavage: {112} Distinct
Help on Color: Color: Black brown.
Help on Density: Density: 3.305
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Bartonite

Help on RL Color: RL Color: Yellowish green-gray to yellowish green-brown.
Help on RL Pleochroism: RL Pleochroism: Very weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Bartonite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   21.70   18.30 
   
 420 nm   16.70   14.40 
 440 nm   17.70   17.20 
 460 nm   18.40   18.60 
 480 nm   19.40   19.50 
 500 nm   19.70   20.60 
 520 nm   20.30   21.40 
 540 nm   20.90   21.80 
 560 nm   21.90   22.70 
 580 nm   22.70   23.20 
 600 nm   23.40   23.70 
 620 nm   23.90   24.30 
 640 nm   24.70   25.10 
 660 nm   25.00   25.50 
 680 nm   25.20   26.10 
 700 nm   26.40   26.50 
Calculated Relative Intensity Colors of Bartonite in Air
Relative
Intensity		    0%   50% 100% 150% 200% 250% 300% 350% 400% 450% 490%
R1                      
R2                      
 

Calculated Properties of Bartonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.20 gm/cc
note: Specific Gravity of Bartonite =3.33 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEBartonite = 18.21 barns/electron
U=PEBartonite x relectron= 58.34 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 144.76 (Gamma Ray American Petroleum Institute Units)
Concentration of Bartonite per GRapi unit = 0.69 (%)

Estimated Radioactivity from Bartonite - barely detectable

 

Bartonite Classification
Help on Dana Class: Dana Class: 02.09.19.01 (02)Sulfides - Including Selenides and Tellurides
  (02.09)where Am Bn Xp, with (m+n):p=1:1
  (02.09.19)Bartonite Group
 
02.09.19.01 Bartonite K3Fe10S14 I 4/mmm 4/m 2/m 2/m
 
02.09.19.02 Chlorbartonite! K6Fe24S26(Cl,S) I 4/mmm 4/m 2/m 2/m
Help on Strunz Class: Strunz Class: 02.FC.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.F - Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O
  02.FC -With Cl, Br, I (halide-sulfides)
 
02.FC.10 Bartonite K3Fe10S14 I 4/mmm 4/m 2/m 2/m
 
02.FC.10 Chlorbartonite! K6Fe24S26(Cl,S) I 4/mmm 4/m 2/m 2/m
 

Other Bartonite Information
Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Bartonite :
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

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

Bartonite

K3Fe10S14
Dana No: 02.09.19.01 Strunz No: 02.FC.10
Locality:

 

Notes: