|
![Mineralogy Database Mineralogy Database](/images/Hedyphane_Crystal.gif) |
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 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 Scalenohedral H-M Symbol (3 2/m) Space Group: P 3m1 |
X Ray Diffraction: |
By Intensity(I/Io): 2.78(1), 2.14(0.5), 5.9(0.5), |
|
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: |
PEBerndtite = 201.35 barns/electron U=PEBerndtite 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 :
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:
|
|
|
|
|
|
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.