Berndtite Mineral Data

General Berndtite Information

Chemical Formula:

SnS2

Composition:

Molecular Weight = 182.84 gm

Tin 64.92 % Sn

Sulfur 35.08 % S

______

100.00 %

Empirical Formula:

SnS₂

Environment:

Secondary mineral in tin sulfide veins and in a high temperature deposit, hydrothermally altered.

IMA Status:

Approved IMA 1964

Locality:

Cerro de Potosi, Bolivia. Link to MinDat.org Location Data.

Name Origin:

Named for Fritz Berndt, German mineralogist.

Name Pronunciation:

Berndtite + Pronunciation

Berndtite Image

Images:

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

Axial Ratios:

a:c = 1:1.61253

Cell Dimensions:

a = 3.639, c = 5.868, Z = 1; V = 67.30 Den(Calc)= 4.51

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/I_o): 2.78(1), 2.14(0.5), 5.9(0.5),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

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

Cleavage:

{0001} Good

Color:

Grayish yellow, Yellow brown.

Density:

4.5

Diaphaneity:

Transparent to Translucent

Habit:

Pseudo Hexagonal - Crystals show a hexagonal outline.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

1-2 - Between Talc and Gypsum

Luster:

Adamantine

Streak:

golden yellow

Optical Properties of Berndtite

Optical Data:

Uniaxial (-), e=1.705, w=1.93, bire=0.2250.

Calculated Properties of Berndtite

Electron Density:

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

Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Photoelectric:

PE_Berndtite= 201.35 barns/electron
U=PE_Berndtite x rElectron Density= 814.53 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Berndtite is Not Radioactive

Berndtite Classification

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

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

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.75,p1436,1990) OPTIC PROP.(Dana8)

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

Search for Berndtite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Berndtite :

A Bijoux Google Search for Berndtite
Adam's Minerals Google Search for Berndtite
Cape Minerals Google Search for Berndtite
Dakota Matrix Minerals Google Search for Berndtite
Excalibur Mineral Corp. Google Search for Berndtite
Exceptional Minerals Google Search for Berndtite
John Betts Fine Minerals Search for Berndtite
McDougall Minerals Google Search for Berndtite
Mineral News Website Link
Rock and Mineral Shows Google Search for Berndtite
Weinrich Minerals, Inc. Google Search for Berndtite

Ask about Berndtite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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: