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About BerndtiteHide

Fritz Berndt
1 - 2
Specific Gravity:
Crystal System:
Member of:
For Dr. Fritz Berndt, born 14 November 1916, German Mineralogist at Corporation Minera de Bolivia, Oruro.
There are two polytypes, -2T and -4H.

Classification of BerndtiteHide


2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
E : Metal Sulfides, M: S <= 1:2
A : M:S = 1:2 - With Cu, Ag, Au

12 : AmBnXp, with (m+n):p = 1:2

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
6 : Sulphides etc. of Sb and Pb

Physical Properties of BerndtiteHide

Transparent, Translucent
Golden yellow
1 - 2 on Mohs scale
On {0001}
4.5 g/cm3 (Measured)    4.55 g/cm3 (Calculated)
Measured on synthetic material

Optical Data of BerndtiteHide

Uniaxial (-)
RI values:
nω = 1.930 nε = 1.705
Max Birefringence:
δ = 0.225
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dark greenish gray
Colour in reflected light:
Internal Reflections:
Intense brownish to orange-yellow

Chemical Properties of BerndtiteHide


Crystallography of BerndtiteHide

Crystal System:
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
Cell Parameters:
a = 3.639 Å, c = 5.868 Å
a:c = 1 : 1.613
Unit Cell V:
67.30 ų (Calculated from Unit Cell)
Tabular hexagonal crystals
On C6 polymorph

Crystal StructureHide

Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0000625BerndtiteHazen R M, Finger L W (1978) The crystal structures and compressibilities of layer minerals at high pressure. I. SnS2, berndtite American Mineralogist 63 289-29219780293
0000626BerndtiteHazen R M, Finger L W (1978) The crystal structures and compressibilities of layer minerals at high pressure. I. SnS2, berndtite American Mineralogist 63 289-29219781.2293
0000627BerndtiteHazen R M, Finger L W (1978) The crystal structures and compressibilities of layer minerals at high pressure. I. SnS2, berndtite American Mineralogist 63 289-29219783293
0011799BerndtiteWyckoff R W G (1963) Second edition. Interscience Publishers, New York, New York Crystal Structures 1 239-44419630293
0018172BerndtiteOftedal I (1926) Die Kristallstruktur von Sn S2 _cod_database_code 1011330 Norsk Geologisk Tidsskrift 9 225-23319260293
CIF Raw Data - click here to close

Type Occurrence of BerndtiteHide

Other Language Names for BerndtiteHide


Relationship of Berndtite to other SpeciesHide

Member of:
Other Members of this group:
KitkaiteNiTeSeTrig. 3m (3 2/m) : P3m1
MeloniteNiTe2Trig. 3m (3 2/m) : P3m1
MerenskyitePdTe2Trig. 3m : P3m1

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Berndtite associated with Tschermigite(NH4)Al(SO4)2 · 12H2O
1 photo of Berndtite associated with HerzenbergiteSnS
1 photo of Berndtite associated with OttemanniteSn2S3

Related Minerals - Nickel-Strunz GroupingHide

2.EA.05Sylvanite(Au,Ag)2Te4Mon. 2/m : P2/b
2.EA.15KrenneriteAu3AgTe8Orth. mm2 : Pma2
2.EA.20KitkaiteNiTeSeTrig. 3m (3 2/m) : P3m1
2.EA.20MeloniteNiTe2Trig. 3m (3 2/m) : P3m1
2.EA.20MerenskyitePdTe2Trig. 3m : P3m1
2.EA.30DrysdalliteMoSe2Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.EA.30MolybdeniteMoS2Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.EA.30TungsteniteWS2Trig. 3m : R3m

Related Minerals - Dana Grouping (8th Ed.)Hide 3m (3 2/m) : P3m1 3m (3 2/m) : P3m1,Pd)(Te,Bi)2Trig. 3m : P3m1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

3.6.1HerzenbergiteSnSOrth. mmm (2/m 2/m 2/m)
3.6.2OttemanniteSn2S3Orth. mmm (2/m 2/m 2/m)
3.6.4StistaiteSnSbTrig. 3m (3 2/m) : R3m
3.6.5GalenaPbSIso. m3m (4/m 3 2/m) : Fm3m
3.6.6ClausthalitePbSeIso. m3m (4/m 3 2/m) : Fm3m
3.6.7AltaitePbTeIso. m3m (4/m 3 2/m) : Fm3m
3.6.9AschamalmitePb6Bi2S9Mon. 2/m
3.6.10Betekhtinite(Cu,Fe)21Pb2S15Orth. mmm (2/m 2/m 2/m) : Immm
3.6.11Shadlunite(Pb,Cd)(Fe,Cu)8S8Iso. m3m (4/m 3 2/m) : Fm3m

Other InformationHide

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 BerndtiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Moh, G.H. and Berndt, F. (1964) Two new natural tin sulfides, Sn2S3 and SnS2 Neues Jahrbuch für Mineralogie - Monatshefte: 3: 94-95.
Fleischer, M. (1965) New mineral names. American Mineralogist: 50: 2096-2111.
Moh, G.H. (1966) Das binäre system zinn-schwefel und seine minerale. Fortschritte der Mineralogie: 42: 211-211.
Clark, A.H. (1972) On the natural occurrence of tin sulphides (Benrdtite). Naturawissenschaften: 59: 361.
Fleischer, M. (1973)New mineral names. American Mineralogist: 58: 347-349.
Fleischer, M., Chao, G.Y., Cabri, L.J. (1975) New mineral names. American Mineralogist: 60: 736-739.
Bailey, S.W. (1977) Report of the I.M.A-I.U.Cr. Joint Committee on Nomenclature. American Mineralogist: 62: 411-415.
Hazen, R.M., Finger, L.W. (1978) The crystal structures and compressibilities of layer minerals at high pressure. I. SnS2. berndtite. American Mineralogist: 63: 289-292.
Bayliss, P., Clark, A.H. (1990) Mineralogical notes: mineral nomenclature: berndtite polytypes. Mineralogical Magazine: 54: 137-137.

Internet Links for BerndtiteHide

Localities for BerndtiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Oruro
    • Avaroa Province
      • Huari
Van King
    • Dalence Province
      • Santa Fé mining district
Jiménez-Franco, A., Alfonso Abella, M. P., Canet Miquel, C., & Trujillo, J. E. (2018). Mineral chemistry of In-bearing minerals in the Santa Fe mining district, Bolivia. Andean Geology, 45(3), 410-432.
Jiménez-Franco, A., Alfonso Abella, M. P., Canet Miquel, C., & Trujillo, J. E. (2018). Mineral chemistry of In-bearing minerals in the Santa Fe mining district, Bolivia. Andean Geology, 45(3), 410-432.
Jiménez-Franco, A., Alfonso Abella, M. P., Canet Miquel, C., & Trujillo, J. E. (2018). Mineral chemistry of In-bearing minerals in the Santa Fe mining district, Bolivia. Andean Geology, 45(3), 410-432.
    • Poopó Province
Torres, B., Melgarejo, J. C., Torró, L., Camprubí, A., Castillo-Oliver, M., Artiaga, D., ... & Arce-Burgoa, O. R. (2019). The Poopó Polymetallic Epithermal Deposit, Bolivia: Mineralogy, Genetic Constraints, and Distribution of Critical Elements. Minerals, 9(8), 472.
  • Potosí
    • Potosí City
Moh, G.H. and Berndt, F. (1965) American Mineralogist, 50, 2107.
  • Thuringia
    • Ronneburg U deposit
T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
  • Hokkaidō Prefecture
    • Ishikari Subprefecture
      • Sapporo City
        • Minami-ku
The Mineral Species of Japan (5th ed) Matsubara; Min. Jour. (Japan): 15:222-232.; Eijun Ohta (1991) Polymetallic Mineralization at the Toyoha Mine, Hokkaido, Japan. Mining Geology 41:279-295
  • Erongo Region
    • Arandis Constituency
No reference
    • Karibib Constituency
      • Spitzkopje Area
        • Klein Spitzkopje granite stock (Kleine Spitzkoppe; Klein Spitzkoppe)
  • Castelo Branco
    • Covilhã
Sopa de Pedras, A. M. Galopim de Carvalho, Gradiva, Lisbon
  • Viseu
    • Vila Nova de Paiva
      • Queiriga
Handbook of Mineralogy
  • Pennsylvania
    • Schuylkill Co.
Reed, Juliet C. (1976), Annotated Biblio. of Minerals New to the Pennsylvania List 1965-1974, The Mineralogical Society of PA, Inc.: 19; Grant, R.W. (Apr 74), PA Mins. (PM)(136), Keystone Newsletter; Finkelman, et al, Geol. Soc. Am. Abstracts with Program
Mineral and/or Locality  
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