Ludlockite-(Pb) Mineral Data

Advertisment

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

Your premier supplier of quality mineral specimens from Southern Africa and the world at large

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

Weinrich Minerals, A Dealer in Fine Mineral Specimens - Since 1989. We buy collections and single high quality specimens.

General Ludlockite-(Pb) Information

Chemical Formula:

PbFe+++4As+++10O22

Composition:

Molecular Weight = 1,531.79 gm

Iron 14.58 % Fe 20.85 % Fe₂O₃

Arsenic 48.91 % As 64.58 % As₂O₃

Lead 13.53 % Pb 14.57 % PbO

Oxygen 22.98 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

PbFe³⁺₄As₁₀O₂₂

Environment:

Oxidized ore bodies containing lead, iron, and As bearing sulfosalts.

IMA Status:

Not Approved IMA 1977

Locality:

In a boulder of ore found at Tsumeb, Namibia. Link to MinDat.org Location Data.

Name Origin:

Named for mineral dealers Ludlow Smith and Locke Key, who discovered the mineral.

Name Pronunciation:

Ludlockite-(Pb) + Pronunciation

Synonym:

Ludlockite

Search for Ludlockite-(Pb) Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Ludlockite-(Pb) Crystallography

Axial Ratios:

a:b:c =0.8635:1:1.5197

Cell Dimensions:

a = 10.426, b = 12.074, c = 18.349, Z = 4; alpha = 101.84°, beta = 100.21°, gamma = 90.6° V = 2,224.77 Den(Calc)= 4.57

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 8.81(1), 2.94(0.9), 10.9(0.9),2.86(0.7), 3.16(0.7), 3.33(0.7), 4.47(0.6), 4.74(0.6),

Physical Properties of Ludlockite-(Pb)

Cleavage:

{011} Perfect, {021} Perfect

Color:

Reddish brown.

Density:

4.37 - 4.4, Average = 4.38

Habit:

Acicular - Occurs as needle-like crystals.

Hardness:

1.5-2 - Talc-Gypsum

Luster:

Subadamantine

Streak:

pale brown

Optical Properties of Ludlockite-(Pb)

Gladstone-Dale:

CI meas= -0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2274,KPDmeas= 0.2376,KC= 0.2368
Ncalc = 2.03 - 2.08

Optical Data:

Biaxial (+), a=1.96, b=2.055, g=2.11, bire=0.1500

Calculated Properties of Ludlockite-(Pb)

Electron Density:

Bulk Density (Electron Density)=3.96 gm/cc
note: Specific Gravity of Ludlockite-(Pb) =4.39 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_{Ludlockite-(Pb)}= 269.51 barns/electron
U=PE_{Ludlockite-(Pb)} x rElectron Density=1,067.76 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ludlockite-(Pb) is Not Radioactive

Ludlockite-(Pb) Classification

Dana Class:

45.01.14.01 (45)Acid and normal Antimonites, Arsenites and Phosphites

(45.01)with miscellaneous formulae

(45.01.14)Dana Group

45.01.14.01 Ludlockite-(Pb)* PbFe4As10O22 P1 1

Strunz Class:

04.JA.45 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.J - Arsenites, Antimonites, Bismuthites, Sulfites,

04.JA -Arsenites, antimonites, bismuthites; without additional anions, without H2O

04.JA.45 Ludlockite (Fe,Pb)As2O6 A1 1

04.JA.45 Ludlockite-(Pb)* PbFe4As10O22 P1 1

Other Ludlockite-(Pb) Information

References:

NAME( MinRec) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

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

Search for Ludlockite-(Pb) using:

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

Visit our Advertisers for Ludlockite-(Pb) :

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

Ask about Ludlockite-(Pb) 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 Ludlockite-(Pb) Specimen Label here :

Ludlockite-(Pb)

PbFe+++4As+++10O22
Dana No: 45.01.14.01 Strunz No: 04.JA.45
Locality:

Notes: