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Bartonite Mineral Data
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General Bartonite Information
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 Chemical Formula: |
K3Fe10S14 |
| Composition: |
Molecular Weight = 1,124.69 gm |
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Potassium 10.43 % K |
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Iron 49.66 % Fe |
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Sulfur 39.92 % S |
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______ |
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100.00 % |
| Empirical Formula: |
K3Fe2+10S14 |
| Environment: |
In clots with other sulfides and silicates in an alkalic diatreme which intruded Franciscan rocks. |
| IMA Status: |
Approved IMA 1981 |
| Locality: |
Coyote Peak diatreme, 16 miles SW of Orick, Humboldt Co. California. Link to MinDat.org Location Data. |
| Name Origin: |
For Paul B. Barton, Jr., sulfide petrologist with the U.S. Geological Society. |
| Name Pronunciation: |
Bartonite + Pronunciation  |
| Synonym: |
ICSD 100746 |
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PDF 35-476 |
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Bartonite Image |
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Images:
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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 |
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Bartonite Crystallography
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| Axial Ratios: |
a:c = 1:1.9787 |
| Cell Dimensions: |
a = 10.424, c = 20.626, Z = 4; V = 2,241.22 Den(Calc)= 3.33 |
| Crystal System: |
Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm |
| X Ray Diffraction: |
By Intensity(I/Io): 2.998(1), 5.99(0.77), 1.833(0.4), |
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Physical Properties of Bartonite
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| Cleavage: |
{112} Distinct |
| Color: |
Black brown. |
| Density: |
3.305 |
| Diaphaneity: |
Opaque |
| Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). |
| Hardness: |
3.5 - Copper Penny |
| Luster: |
Metallic |
| Streak: |
black |
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Optical Properties of Bartonite
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| RL Color: |
Yellowish green-gray to yellowish green-brown. |
| RL Pleochroism: |
Very weak. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Bartonite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
21.70 |
18.30 |
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| 420 nm |
16.70 |
14.40 |
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| 440 nm |
17.70 |
17.20 |
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| 460 nm |
18.40 |
18.60 |
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| 480 nm |
19.40 |
19.50 |
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| 500 nm |
19.70 |
20.60 |
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| 520 nm |
20.30 |
21.40 |
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| 540 nm |
20.90 |
21.80 |
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| 560 nm |
21.90 |
22.70 |
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| 580 nm |
22.70 |
23.20 |
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| 600 nm |
23.40 |
23.70 |
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| 620 nm |
23.90 |
24.30 |
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| 640 nm |
24.70 |
25.10 |
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| 660 nm |
25.00 |
25.50 |
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| 680 nm |
25.20 |
26.10 |
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| 700 nm |
26.40 |
26.50 |
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Calculated Relative Intensity Colors of Bartonite in Air
Relative
Intensity |
0% |
50% |
100% |
150% |
200% |
250% |
300% |
350% |
400% |
450% |
490% |
| R1 |
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| R2 |
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Calculated Properties of Bartonite
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| Electron Density: |
Bulk Density (Electron Density)=3.20 gm/cc
note: Specific Gravity of Bartonite =3.33 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PEBartonite = 18.21 barns/electron
U=PEBartonite x relectron= 58.34 barns/cc.
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| Radioactivity: |
GRapi = 144.76 (Gamma Ray American Petroleum Institute Units)
Concentration of Bartonite per GRapi unit = 0.69 (%)
Estimated Radioactivity from Bartonite  - barely detectable
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Bartonite Classification
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| Dana Class: |
02.09.19.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.09)where Am Bn Xp, with (m+n):p=1:1 |
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(02.09.19)Bartonite Group |
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02.09.19.01 Bartonite K3Fe10S14 I 4/mmm 4/m 2/m 2/m |
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02.09.19.02 Chlorbartonite! K6Fe24S26(Cl,S) I 4/mmm 4/m 2/m 2/m |
| Strunz Class: |
02.FC.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.F - Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O |
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02.FC -With Cl, Br, I (halide-sulfides) |
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02.FC.10 Bartonite K3Fe10S14 I 4/mmm 4/m 2/m 2/m |
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02.FC.10 Chlorbartonite! K6Fe24S26(Cl,S) I 4/mmm 4/m 2/m 2/m |
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Other Bartonite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| 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 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
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Bartonite
K3Fe10S14
Dana No: 02.09.19.01 Strunz No: 02.FC.10
Locality:
Notes:
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