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Berthierite

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Berthier
Formula:
FeSb2S4
System:
Orthorhombic
Colour:
Dark steel-grey, often ...
Lustre:
Metallic
Hardness:
2 - 3
Name:
Named in 1827 by Wilhelm Karl von Haidinger in honor of Pierre Berthier [July 3, 1782, Nemours, Seine-et-Marne, France – August 24, 1861 France], French chemist and mineralogist at the Ecole des Mines and he was Inspector of Mines during his career. He named a number of species including chamosite, franklinite, halloysite, and nontronite. He is well-know for his study of bauxite.
This page provides mineralogical data about Berthierite.

Classification of Berthierite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
2.HA.20

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
A : With Cu, Ag, Fe (without Pb)
Dana 7th ed.:
3.7.9.3
3.7.9.3

3 : SULFOSALTS
7 : ø = 2
5.8.4

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
8 : Sulpharsenites etc. of Mn, Fe, Co and Ni
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Type Occurrence of Berthierite

Year of Discovery:
1827

Occurrences of Berthierite

Geological Setting:
Low temperature hydrothermal veins rich in antimony and deficient in sulfur

Physical Properties of Berthierite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Dark steel-grey, often with iridescent tarnish.
Streak:
Dark brownish-grey.
Hardness (Mohs):
2 - 3
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
Indistinct prismatic.
Density:
4.64 g/cm3 (Measured)    4.66 g/cm3 (Calculated)

Crystallography of Berthierite

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 11.44Å, b = 14.12Å, c = 3.76Å
Ratio:
a:b:c = 0.81 : 1 : 0.266
Unit Cell Volume:
V 607.36 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Prismatic on, and striated parallel to [001]. Prismatic to fibrous massive, plumose, radial; granular.
Comment:
sp. gr. Pnam
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.663 (92)
3.628 (51)
3.181 (77)
2.999 (52)
2.862 (78)
2.621 (93)
2.601 (100)
Comments:
Synthetic.

Optical Data of Berthierite

Type:
Anisotropic
Anisotropism:
Very strong
Reflectivity:
400nmR1=32.6%R2= 46.2%
420nmR1=32.2%R2= 45.9%
440nmR1=31.8%R2= 45.5%
460nmR1=31.2%R2= 45.0%
480nmR1=30.7%R2= 44.4%
500nmR1=30.4%R2= 43.8%
520nmR1=30.2%R2= 43.1%
540nmR1=30.3%R2= 42.5%
560nmR1=30.4%R2= 41.9%
580nmR1=30.8%R2= 41.4%
600nmR1=31.1%R2= 40.8%
620nmR1=31.4%R2= 40.3%
640nmR1=31.4%R2= 39.9%
660nmR1=31.4%R2= 39.4%
680nmR1=31.4%R2= 38.9%
700nmR1=31.3%R2= 38.4%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 46.2%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Grey
Pleochroism:
Visible
Comments:
Markedly pleochroic.

Chemical Properties of Berthierite

Formula:
FeSb2S4
Essential elements:
All elements listed in formula:
Analytical Data:
Herja, Romania.
Fe (13.43)
Mn (trace)
Sb (56.06)
S (29.46)
insol. (0.33)
Total (99.28)
Empirical Formula:
Fe1.05Sb2.01S4.00
Common Impurities:
Mn,Cu,Pb,Ag

Relationship of Berthierite to other Species

Common Associates:
2.HA.05ChalcostibiteCuSbS2
2.HA.05EmplectiteCuBiS2
2.HA.10MiargyriteAgSbS2
2.HA.20GaravelliteFeSbBiS4
2.HA.20CleriteMnSb2S4
2.HA.25AramayoiteAg(Sb,Bi)S2
2.HA.25BaumstarkiteAgSbS2
5.8.1SamsoniteAg4MnSb2S6
5.8.2UchucchacuaiteAgMnPb3Sb5S12
5.8.3BenavidesitePb4MnSb6S14
5.8.5JamesonitePb4FeSb6S14
5.8.6Parajamesonite
5.8.7GaravelliteFeSbBiS4
5.8.8IzoklakeitePb27(Cu,Fe,Ag)2(Sb,Bi)19S57
5.8.9MiharaiteCu4FePbBiS6
5.8.10Sakharovaite
5.8.11ArsenohauchecorniteNi18Bi3AsS16
5.8.12TučekiteNi9Sb2S8
5.8.13BismutohauchecorniteNi9Bi2S8
5.8.14ParkeriteNi3Bi2S2
5.8.15HauchecorniteNi9BiSbS8
5.8.16TellurohauchecorniteNi9Bi(Te,Bi)S8
5.8.17LapieiteNiCuSbS3
5.8.18MückeiteNiCu(Bi,Sb)S3
5.8.19Vozhminite(Ni,Co)4(As,Sb)S2

Other Names for Berthierite

Name in Other Languages:

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.

References for Berthierite

Reference List:
Berthier (1827), Ann. chim. phys.: 35: 351 (as Haidingerite).

Berthier (1827), Ann. Phys.: 11: 478 (as Haidingerite).

Haidinger (1827), Edinburgh Journal of Science: 7: 353.

Groth (1874): 16: 80 (as Eisenantimonglanz).

Ungemach (1906), Bull. soc. min.: 29: 266.

Doelter (1926): 4(1): 586.

Stillwell (1926), Mineralogical Magazine: 21: 83.

Krenner (1928), Centralblatt für Mineralogie: 265.

Zsivny and Zomboro (1934), Mineralogical Magazine: 23: 566.

Buerger (1936), American Mineralogist: 21: 442.

Buerger (1936), American Mineralogist: 21: 205.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 481-482.

American Mineralogist (1955): 40: 226-238.

Barton, P.B., Jr. (1971): The Fe–Sb–S system. Econ. Geol., 66, 121–132.

Lemoine, P., D. Carré, and F. Robert (1991): Structure du sulfure de fer et
d’antimoine, FeSb2S4 (berthiérite). Acta Crystallogr., C47, 938–940.

Kharbish, S. & András, P. (2014): Investigations of the Fe sulfosalts berthierite, garavellite, arsenopyrite and gudmundite by Raman spectroscopy. Mineralogical Magazine 78,1287-1299.

Internet Links for Berthierite

Specimens:
The following Berthierite specimens are currently listed for sale on minfind.com.

Localities for Berthierite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Mineral and/or Locality  
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