Berndtite Mineral Data (original) (raw)

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.

Help on Name Pronunciation: Name Pronunciation:

Berndtite + Pronunciation Say BERNDTITE

Berndtite Image

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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 Diaphaneity: Diaphaneity:

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:

Bulk Density (Electron Density)=4.05 gm/cc
note: Specific Gravity of Berndtite =4.51 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Help on Photoelectric: Photoelectric:

PEBerndtite = 201.35 barns/electron
U=PEBerndtite x rElectron Density= 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:

02.12.14.05 (02)Sulfides - Including Selenides and Tellurides

(02.12)where Am Bn Xp, with (m+n):p=1:2

(02.12.14)Melonite Group (Trigonal: P-3m1) AX2 type

02.12.14.01 Melonite NiTe2 P 3m1 3 2/m

02.12.14.02 Kitkaite NiTeSe P 3m1 3 2/m

02.12.14.03 Moncheite (Pt,Pd)(Te,Bi)2 P 3m1 3 2/m

02.12.14.04 Merenskyite (Pd,Pt)(Te,Bi)2 P 3m1 3m

02.12.14.05 Berndtite SnS2 P 3m1 3 2/m

02.12.14.06 Shuangfengite IrTe2 P 3m1 3 2/m

02.12.14.07 Sudovikovite! PtSe2 P 3m1 3 2/m

Help on Strunz Class: Strunz Class:

02.EA.20 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.E - Metal Sulfides, M:S � 1:2

02.EA -M:S = 1:2

02.EA.20 Berndtite SnS2 P 3m1 3 2/m

02.EA.20 Merenskyite (Pd,Pt)(Te,Bi)2 P 3m1 3m

02.EA.20 Melonite NiTe2 P 3m1 3 2/m

02.EA.20 Kitkaite NiTeSe P 3m1 3 2/m

02.EA.20 Moncheite (Pt,Pd)(Te,Bi)2 P 3m1 3 2/m

02.EA.20 Sudovikovite! PtSe2 P 3m1 3 2/m

02.EA.20 Shuangfengite IrTe2 P 3m1 3 2/m

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 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST

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Print or Cut-and-Paste your Berndtite Specimen Label here :

Berndtite

SnS2
Dana No: 02.12.14.05 Strunz No: 02.EA.20
Locality:

Notes: