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Berthierite Mineral Data
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General Berthierite Information
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 Chemical Formula: |
FeSb2S4 |
| Composition: |
Molecular Weight = 427.61 gm |
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Iron 13.06 % Fe |
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Antimony 56.94 % Sb |
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Sulfur 30.00 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Fe2+Sb2S4 |
| Environment: |
In low-temperature hydrothermal antimony veins. |
| IMA Status: |
Valid Species (Pre-IMA) 1827 |
| Locality: |
Pontgibaud, Puy-de-Dome, France. Link to MinDat.org Location Data. |
| Name Origin: |
Named after the French chemist, P. Berthier (1782-1861). |
| Name Pronunciation: |
Berthierite + Pronunciation  |
| Synonym: |
Anglarite |
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Chazellite |
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Martourite |
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Berthierite Image |
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Images:
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Berthierite Crystallography
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| Axial Ratios: |
a:b:c =0.8101:1:0.2662 |
| Cell Dimensions: |
a = 11.44, b = 14.12, c = 3.76, Z = 4; V = 607.36 Den(Calc)= 4.68 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnam |
| X Ray Diffraction: |
By Intensity(I/Io): 3.68(1), 2.63(0.8), 4.37(0.6), |
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Physical Properties of Berthierite
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| Cleavage: |
{010} Good |
| Color: |
Dark steel gray, Dark brownish gray. |
| Density: |
4 - 4.6, Average = 4.3 |
| Diaphaneity: |
Opaque |
| Fracture: |
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. |
| Habit: |
Acicular - Occurs as needle-like crystals. |
| Habit: |
Fibrous - Crystals made up of fibers. |
| Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. |
| Hardness: |
2-2.5 - Gypsum-Finger Nail |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Metallic |
| Streak: |
brownish gray |
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Optical Properties of Berthierite
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| RL Anisotrophism: |
Strong. |
| RL Color: |
Gray. |
| RL Pleochroism: |
Marked. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Berthierite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
33.00 |
43.00 |
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| 420 nm |
32.40 |
42.80 |
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| 440 nm |
31.80 |
42.60 |
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| 460 nm |
31.30 |
42.30 |
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| 480 nm |
31.00 |
42.00 |
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| 500 nm |
30.80 |
41.60 |
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| 520 nm |
30.80 |
41.20 |
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| 540 nm |
30.90 |
40.80 |
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| 560 nm |
31.20 |
40.30 |
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| 580 nm |
31.50 |
39.80 |
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| 600 nm |
31.70 |
39.40 |
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| 620 nm |
31.90 |
39.00 |
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| 640 nm |
32.00 |
38.70 |
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| 660 nm |
32.00 |
38.30 |
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| 680 nm |
31.90 |
38.00 |
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| 700 nm |
31.60 |
37.60 |
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Calculated Relative Intensity Colors of Berthierite in Air
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
240% |
270% |
290% |
| R1 |
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| R2 |
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Calculated Properties of Berthierite
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| Electron Density: |
Bulk Density (Electron Density)=4.20 gm/cc
note: Specific Gravity of Berthierite =4.68 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0050184312
Boson Index = 0.9949815688 |
| Photoelectric: |
PEBerthierite = 192.42 barns/electron
U=PEBerthierite x rElectron Density= 808.70 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Berthierite is Not Radioactive |
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Berthierite Classification
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| Dana Class: |
03.07.09.03 (03)Sulfides - Sulfosalts |
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(03.07)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.07.09)Galenobismutite Group |
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03.07.09.01 Galenobismutite PbBi2S4 Pnam 2/m 2/m 2/m |
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03.07.09.02 Sakharovaite? (Pb,Fe)(Bi,Sb)2S4 Mono |
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03.07.09.03 Berthierite FeSb2S4 Pnam 2/m 2/m 2/m |
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03.07.09.04 Garavellite FeSbBiS4 Pnam 2/m 2/m 2/m |
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03.07.09.05 Clerite! MnSb2S4 Pnam 2/m 2/m 2/m |
| Strunz Class: |
02.HA.20 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.H - Sulfosalts of SnS Archetype |
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02.HA -With Cu, Ag, Fe (without Pb) |
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02.HA.20 Berthierite FeSb2S4 Pnam 2/m 2/m 2/m |
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02.HA.20 Clerite! MnSb2S4 Pnam 2/m 2/m 2/m |
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02.HA.20 Garavellite FeSbBiS4 Pnam 2/m 2/m 2/m |
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Other Berthierite Information
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| References: |
NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Berthierite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Dunn)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - HyperPhysics
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - WWW-MINCRYST
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Print or Cut-and-Paste your Berthierite Specimen Label here :
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Berthierite
FeSb2S4
Dana No: 03.07.09.03 Strunz No: 02.HA.20
Locality:
Notes:
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