Bernardite Mineral Data (original) (raw)

General Bernardite Information

Help on Chemical Formula: Chemical Formula:

Tl(As,Sb)5S8

Help on Composition: Composition:

Molecular Weight = 952.59 gm

Thallium 21.46 % Tl

Antimony 31.95 % Sb

Arsenic 19.66 % As

Sulfur 26.93 % S

______

100.00 %

Help on Empirical Formula: Empirical Formula:

TlAs2.5Sb2.5S8

Help on IMA Status: IMA Status:

Approved IMA 1989

Help on Locality: Locality:

Lengenbach, Binn, Switzerland; Allchar, Macedonia. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Names in 1989 for Jan Bernard (b.1928), Czech mineralogist.

Help on Name Pronunciation: Name Pronunciation:

Bernardite + Pronunciation Say BERNARDITE

Help on Synonym: Synonym:

ICSD 63481

PDF 46-1339

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Bernardite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =1.9466:1:1.3373

Help on Cell Dimensions: Cell Dimensions:

a = 15.647, b = 8.038, c = 10.75, Z = 4; beta = 91.27° V = 1,351.70 Den(Calc)= 4.68

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.06(1), 4.28(0.74), 4.46(0.65),

Help on Forms: Forms:

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| | Forms:( 0 1 2) ( 2 1 0) ( 2 0 1) ( 1 0 0) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Click Here for Large Bernardite Structure Window Crystal Structure:

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| | Pasava J , Pertlik F , Stumpfl E F , Zemann J , Mineralogical Magazine , 53 (1989) p.531-538, Bernardite, a new thallium arsenic sulphosalt from Allchar,, Macedonia, with a determination of the crystal structure, Locality: Allchar, Macedonia | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Bernardite

Help on Cleavage: Cleavage:

None

Help on Color: Color:

Black.

Help on Density: Density:

4.5

Help on Diaphaneity: Diaphaneity:

Opaque

Help on Hardness: Hardness:

2 - Gypsum

Help on Luster: Luster:

Earthy (Dull)

Help on Streak: Streak:

dark red

Calculated Properties of Bernardite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=4.12 gm/cc
note: Specific Gravity of Bernardite =4.68 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.002019714
Boson Index = 0.997980286

Help on Photoelectric: Photoelectric:

PEBernardite = 481.57 barns/electron
U=PEBernardite x rElectron Density=1,982.63 barns/cc.

Help on Radioactivity: Radioactivity:

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

Bernardite Classification

Help on Dana Class: Dana Class:

03.08.14.02 (03)Sulfides - Sulfosalts

(03.08)where 1 < z/y <2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.08.14)Dana Group

03.08.14.01 Parapierrotite Tl(Sb,As)5S8 P 21/n 2/m

03.08.14.02 Bernardite Tl(As,Sb)5S8 P 21/c 2/m

Help on Strunz Class: Strunz Class:

02.HD.50 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.H - Sulfosalts of SnS Archetype

02.HD -With Tl

02.HD.50 Bernardite Tl(As,Sb)5S8 P 21/c 2/m

Other Bernardite Information

Help on References: References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.75,p1209,1990)

Help on See Also: See Also:

Links to other databases for Bernardite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Bernardite

Tl(As,Sb)5S8
Dana No: 03.08.14.02 Strunz No: 02.HD.50
Locality:

Notes: