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Berthierite

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Pierre Berthier
Formula:
FeSb2S4
Colour:
Dark steel-grey, often with iridescent tarnish.
Lustre:
Metallic
Hardness:
2 - 3
Specific Gravity:
4.64
Crystal System:
Orthorhombic
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-known for his study of bauxite.
This page provides mineralogical data about Berthierite.


Classification of Berthierite

Approved, 'Grandfathered' (first described prior to 1959)
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

Physical Properties of Berthierite

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

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
Common Impurities:
Mn,Cu,Pb,Ag

Crystallography of Berthierite

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 11.44 Å, b = 14.12 Å, c = 3.76 Å
Ratio:
a:b:c = 0.81 : 1 : 0.266
Unit Cell 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

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.

Type Occurrence of Berthierite

Synonyms of Berthierite

Other Language Names for Berthierite

Relationship of Berthierite to other Species

Other Members of this group:
CleriteMnSb2S4
GaravelliteFeSbBiS4
Structurally related to group(s):
Meneghinite Homologous SeriesSeveral synthetic homologues are known.

Common Associates

BaryteBaSO4
PyriteFeS2
QuartzSiO2
StibniteSb2S3
Associated Minerals Based on Photo Data:
Stibnite26 photos of Berthierite associated with Stibnite on mindat.org.
Siderite14 photos of Berthierite associated with Siderite on mindat.org.
Boulangerite10 photos of Berthierite associated with Boulangerite on mindat.org.
Calcite9 photos of Berthierite associated with Calcite on mindat.org.
Limonite6 photos of Berthierite associated with Limonite on mindat.org.
Jamesonite5 photos of Berthierite associated with Jamesonite on mindat.org.
Quartz5 photos of Berthierite associated with Quartz on mindat.org.
Valentinite2 photos of Berthierite associated with Valentinite on mindat.org.
Pyrrhotite2 photos of Berthierite associated with Pyrrhotite on mindat.org.
Andorite2 photos of Berthierite associated with Andorite on mindat.org.

Related Minerals - Nickel-Strunz Grouping

2.HA.05ChalcostibiteCuSbS2
2.HA.05EmplectiteCuBiS2
2.HA.10MiargyriteAgSbS2
2.HA.20GaravelliteFeSbBiS4
2.HA.20CleriteMnSb2S4
2.HA.25AramayoiteAg3Sb2(Bi,Sb)S6
2.HA.25BaumstarkiteAg3Sb3S6

Related Minerals - Hey's Chemical Index of Minerals Grouping

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(Pb,Bi)4FeSb6S14
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

Related Minerals - Dana Grouping (8th Ed.)

3.7.9.1GalenobismutitePbBi2S4
3.7.9.4GaravelliteFeSbBiS4

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:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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).
Von Ungemach, H. (1906) Les Gîtes Métallifères Du Val de Villé, Alsace. Bulletin de la Société Française de Minéralogie et de Cristallographie: 194-282.
Doelter (1926) 4(1): 586.
Stillwell, F.L. (1926) On the Nature of Berthierite. Mineralogical Magazine: 21: 83-86.
Krenner (1928) Centralblatt für Mineralogie: 265.
Zsivny, V., Zomboro, L. (1934) Berthierite from Kisbánya, Carpathians. Mineralogical Magazine: 23: 566-568.
Buerger, M.J. (1936) The crystal structure of berthierite. American Mineralogist: 21: 205-206. (abstract)
Buerger, M.J. (1936) Crystallographic data, unit cell and space group for berthierite (FeSb2S4). American Mineralogist: 21: 442-448.
Palache, C., Berman, H., Frondel, C. (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.
Buerger, M.J., Hahn, T. (1955) The crystal structure of berthierite, FeSb2S4. American Mineralogist: 40: 226-238.
Barton, P.B., Jr. (1971) The Fe–Sb–S system. Economic Geology: 66: 121–132.
Lemoine, P., Carré, D., Robert, F. (1991) Structure du sulfure de fer et d’antimoine, FeSb2S4 (berthiérite). Acta Crystallographica: 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

mindat.org URL:
https://www.mindat.org/min-640.html
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Specimens:
The following Berthierite specimens are currently listed for sale on minfind.com.

Localities for Berthierite

Mineral and/or Locality  
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