Duftite-beta Mineral Data

Duftite-beta Mineral Data +

[Express Minerals] [Minerals for Sale] [About Us] [En EspaÃƒï¿½Ã‚Â±ol] [Mineral Gallery]
Fabre Minerals - Europe's first Internet mineral dealer, on the web since 1996

General Duftite-beta Information

Chemical Formula:

PbCu(AsO4)(OH)

Composition:

Molecular Weight = 426.67 gm

Copper 14.89 % Cu 18.64 % CuO

Arsenic 17.56 % As 26.93 % As₂O₅

Hydrogen 0.24 % H 2.11 % H₂O

Lead 48.56 % Pb 52.31 % PbO

Oxygen 18.75 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

PbCu(AsO₄)(OH)

Environment:

Secondary mineral in the oxidized zone of hydrothermal base metal deposits. Mya form a series with conichalcite.

IMA Status:

Valid Species (Pre-IMA) 1956

Locality:

Tsumeb, Namibia. Link to MinDat.org Location Data.

Name Origin:

Named in 1920 for G. Duft, general manager of the mine at Tsumeb, Namibia.

Synonym:

Beta-duftite

Duftite-beta Image

Images:

Duftite-beta

Comments: Intensely green Duftite-beta on fluorescent calcite.
Location: Tsumeb mine, Tsumeb, Namibia. Scale: .
© Fabre Minerals

Duftite-beta Crystallography

Axial Ratios:

a:b:c =0.8433:1:0.6512

Cell Dimensions:

a = 7.768, b = 9.211, c = 5.999, Z = 4; V = 429.23 Den(Calc)= 6.60

Crystal System:

Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 2₁2₁2₁

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.26(1), 2.65(0.8), 2.85(0.8),

Physical Properties of Duftite-beta

Color:

Green, Olive green, Grayish green.

Density:

6.4

Diaphaniety:

Translucent

Hardness:

3 - Calcite

Luster:

Vitreous - Dull

Optical Properties of Duftite-beta

Gladstone-Dale:

CI meas= -0.103 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.069 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1626,KPDmeas= 0.1677,KC= 0.1521

Optical Data:

Biaxial (-), a=2.04, b=2.08, g=2.1, bire=0.0600

Calculated Properties of Duftite-beta

Electron Density:

r_electron=5.72 gm/cc
note: r_Duftite-beta=6.60 gm/cc.

Fermion Index

Fermion Index = 0.10741
Boson Index = 0.89259

Photoelectric:

PE_Duftite-beta= 879.99 barns/electron
U=PE_Duftite-beta x r_electron=5,036.52 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Duftite-beta is Not Radioactive

Duftite-beta Classification

Dana Class:

41.5.1.4 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.5)where (A B)2 (XO4) Zq

(41.5.1)Dana Group

41.5.1.1 Adelite CaMg(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.5.1.2 Conichalcite CaCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.5.1.3 Austinite CaZn(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.5.1.4 Duftite-beta PbCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.5.1.5 Gabrielsonite PbFe(AsO4)(OH) P 2₁m mm2

41.5.1.6 Tangeite CaCu(VO4)(OH) P 2₁2₁2₁ 2 2 2

41.5.1.7 Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.5.1.8 Cobaltaustinite CaCo(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.5.1.9 Arsendescloizite PbZn(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.5.1.10 Gottlobite! CaMg(VO4,AsO4)(OH) P 2₁2₁2₁ 2 2 2

Strunz Class:

VII/B.26-80* VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb

VII/B.26 - Adelite - Duftite group

VII/B.26-10 Adelite CaMg(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-15 Gottlobite! CaMg(VO4,AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-20 Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-30 Cobaltaustinite CaCo(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-40 Austinite CaZn(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-50 Conichalcite CaCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-60 Tangeite CaCu(VO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-70 Gabrielsonite PbFe(AsO4)(OH) P 2₁m mm2

VII/B.26-80 Duftite-alpha PbCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-80* Duftite-beta PbCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

Other Duftite-beta Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Duftite-beta :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

Search for Duftite-beta using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Duftite-beta :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Duftite-beta Mineral Data :

Ask about Duftite-beta 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 Duftite-beta Specimen Label here :

Duftite-beta

PbCu(AsO4)(OH)
Dana No: 41.5.1.4 Strunz No: VII/B.26-80*
Locality:

Notes: