Berndtite Mineral Data + Say BERNDTITE


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General Berndtite Information

Help on Chemical  Formula: Chemical Formula: SnS2
Help on Composition: Composition: Molecular Weight = 182.84 gm
   Tin     64.92 %  Sn
   Sulfur  35.08 %  S
          ______ 
          100.00 % 
Help on Empirical Formula: Empirical Formula: SnS2
Help on Environment: Environment: Secondary mineral in tin sulfide veins and in a high temperature deposit, hydrothermally altered.
Help on IMA Status: IMA Status: Approved IMA 1964
Help on Locality: Locality: Cerro de Potosi, Bolivia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Fritz Berndt, German mineralogist.
 

Berndtite Image

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Berndtite   Tschermigite

Comments: Yellow crystalline berndtite on tschermigite.
Location: Shamokin, Northumberland County, Pennsylvania, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Berndtite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.61253
Help on Cell Dimensions: Cell Dimensions: a = 3.639, c = 5.868, Z = 1; V = 67.30 Den(Calc)= 4.51
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: P 3m1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.78(1), 2.14(0.5), 5.9(0.5),
Click Here for Large Berndtite Structure Window Crystal Structure:

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Hazen R M , Finger L W , American Mineralogist , 63 (1978) p.289-292, The crystal structures and compressibilities of layer minerals at high, pressure. I. SnS2, berndtite, P = 1 atm

View Additional jPOWD Structure files for Berndtite
[1] [2] [3]
 

Physical Properties of Berndtite

Help on Cleavage: Cleavage: [0001] Good
Help on Color: Color: Grayish yellow, Yellow brown.
Help on Density: Density: 4.5
Help on Diaphaniety: Diaphaniety: Transparent to Translucent
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 1-2 - Between Talc and Gypsum
Help on Luster: Luster: Adamantine
Help on Streak: Streak: golden yellow
 

Optical Properties of Berndtite

Help on Optical Data: Optical Data: Uniaxial (-), e=1.705, w=1.93, bire=0.2250.
 

Calculated Properties of Berndtite

Help on Electron Density: Electron Density:

relectron=4.05 gm/cc
note: rBerndtite =4.51 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.11053
Boson Index = 0.88947
Help on Photoelectric: Photoelectric:

PEBerndtite = 201.35 barns/electron
U=PEBerndtite x relectron= 814.53 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Berndtite is Not Radioactive

 

Berndtite Classification

Help on  Dana Class: Dana Class: 2.12.14.5 (2)Sulfides - Including Selenides and Tellurides
  (2.12)where Am Bn Xp, with (m+n):p=1:2
  (2.12.14)Melonite Group (Trigonal: P3¯m1) AX2 type
 
2.12.14.1 Melonite NiTe2 P 3m1 3 2/m
 
2.12.14.2 Kitkaite NiTeSe P 3m1 3 2/m
 
2.12.14.3 Moncheite (Pt,Pd)(Te,Bi)2 P 3m1 3 2/m
 
2.12.14.4 Merenskyite (Pd,Pt)(Te,Bi)2 P 3m1 3m
 
2.12.14.5 Berndtite SnS2 P 3m1 3 2/m
 
2.12.14.6 Shuangfengite IrTe2 P 3m1 3 2/m
 
2.12.14.7 Sudovikovite! PtSe2 P 3m1 3 2/m
Help on  Strunz Class: Strunz Class: II/D.28-10 II - Sulfides and sulphosalts
  II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
  II/D.28 - Melonite group, Berntdtite - Moncheite series
 
II/D.28-10 Berndtite SnS2 P 3m1 3 2/m
 
II/D.28-20 Kitkaite NiTeSe P 3m1 3 2/m
 
II/D.28-30 Melonite NiTe2 P 3m1 3 2/m
 
II/D.28-35 Sudovikovite! PtSe2 P 3m1 3 2/m
 
II/D.28-40 Merenskyite (Pd,Pt)(Te,Bi)2 P 3m1 3m
 
II/D.28-45 Shuangfengite IrTe2 P 3m1 3 2/m
 
II/D.28-50 Moncheite (Pt,Pd)(Te,Bi)2 P 3m1 3 2/m
 
II/D.28-60 Verbeekite! PdSe2 C 2, Cm, or C 2/m Mono
 

Other Berndtite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.75,p1436,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Berndtite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 - WWW-MINCRYST

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Berndtite

SnS2
Dana No: 2.12.14.5 Strunz No: II/D.28-10
Locality:

 

Notes:

 

 
   
 
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