Baumhauerite-2a Mineral Data

Advertisment

McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs

Adamsminerals.com- Online mineral store front for mineral collectors

For more than thirty (30) years, Excalibur Mineral Corp. has been providing private collectors, researchers, major universities and museums throughout the world with reliably identified, rare and unusual mineral samples for science an

Exceptional Minerals features excellent, high quality mineral specimens for sale. We also have a weekly Best Offer Mineral Auction.

General Baumhauerite-2a Information

Chemical Formula:

Pb3As4S9

Composition:

Molecular Weight = 1,209.88 gm

Arsenic 24.77 % As

Lead 51.38 % Pb

Sulfur 23.85 % S

______

100.00 %

Empirical Formula:

Pb₃As₄S₉

IMA Status:

Approved IMA 1990 (Dana # Added)

Locality:

Link to MinDat.org Location Data.

Name Origin:

Named as the monoclinic polymorph of baumhauerite.

Name Pronunciation:

Baumhauerite-2a + Pronunciation

Baumhauerite-2a Image

Images:

Click Here for Larger Baumhauerite-2a Image

Baumhauerite-2a Sphalerite

Comments: Dark crystal of baumhauerite-2a (same shape as baumhauerite) with olive-green transparent sphalerite crystal on white dolomite.
Location: Lengenbach quarry, Binntal, Valais, Switzerland. Scale: Picture 2 cm tall.
© Walter Gabriel

Baumhauerite-2a Crystallography

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: Unk

Physical Properties of Baumhauerite-2a

Color:

Steel gray.

Diaphaneity:

Opaque

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Hardness:

3 - Calcite

Luster:

Metallic

Streak:

reddish brown

Calculated Properties of Baumhauerite-2a

Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Photoelectric:

PE_{Baumhauerite-2a}= 933.98 barns/electron
U=PE_{Baumhauerite-2a} x rElectron Density= . barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Baumhauerite-2a is Not Radioactive

Baumhauerite-2a Classification

Dana Class:

03.06.13.02 (03)Sulfides - Sulfosalts

(03.06)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.06.13)Dana Group

03.06.13.01 Baumhauerite Pb3As4S9 P1 1

03.06.13.02 Baumhauerite-2a! Pb3As4S9 Unk 2/m

Strunz Class:

02.HC.05b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.H - Sulfosalts of SnS Archetype

02.HC -With only Pb

02.HC.05b Baumhauerite Pb3As4S9 P1 1

02.HC.05b Baumhauerite-2a! Pb3As4S9 Unk 2/m

Other Baumhauerite-2a Information

See Also:

Links to other databases for Baumhauerite-2a :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

Search for Baumhauerite-2a using:

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

Visit our Advertisers for Baumhauerite-2a :

A Bijoux Google Search for Baumhauerite-2a
Adam's Minerals Google Search for Baumhauerite-2a
Cape Minerals Google Search for Baumhauerite-2a
Dakota Matrix Minerals Google Search for Baumhauerite-2a
Excalibur Mineral Corp. Google Search for Baumhauerite-2a
Exceptional Minerals Google Search for Baumhauerite-2a
John Betts Fine Minerals Search for Baumhauerite-2a
McDougall Minerals Google Search for Baumhauerite-2a
Mineral News Website Link
Rock and Mineral Shows Google Search for Baumhauerite-2a
Weinrich Minerals, Inc. Google Search for Baumhauerite-2a

Ask about Baumhauerite-2a 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 Baumhauerite-2a Specimen Label here :

Baumhauerite-2a

Pb3As4S9
Dana No: 03.06.13.02 Strunz No: 02.HC.05b
Locality:

Notes: