Ludlockite-(Pb) Mineral Data + 
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- 45.1.14.1 Ludlockite-(Pb) * PbFe4As10O22 P1 1
- IV/J.07-10 Karibibite Fe2As4(O,OH)9 Unk Ortho
- IV/J.07-20 Ludlockite (Fe,Pb)As2O6 A1 1
- IV/J.07-20* Ludlockite-(Pb) PbFe4As10O22 P1 1
General Ludlockite-(Pb) Information |
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 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. | ||
| Synonym: |
Ludlockite | ||
Search for Ludlockite-(Pb) Images | |||
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Images:
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Ludlockite-(Pb) Crystallography |
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| 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 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 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) |
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| 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) |
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| Gladstone-Dale: |
CI meas= -0.003 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.038 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2279,KPDmeas= 0.2376,KC= 0.2368 |
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| Optical Data: |
Biaxial (+), a=1.96, b=2.055, g=2.11, bire=0.1500 | ||
Calculated Properties of Ludlockite-(Pb) |
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| Electron Density: |
relectron=3.96 gm/cc |
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| Fermion Index |
Fermion Index = 0.03309 Boson Index = 0.96691 |
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| Photoelectric: |
PELudlockite-(Pb) = 269.51 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Ludlockite-(Pb) is Not Radioactive |
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Ludlockite-(Pb) Classification |
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| Dana Class: |
45.1.14.1 (45)Acid and normal Antimonites, Arsenites and Phosphites | ||
| (45.1)with miscellaneous formulae | |||
| (45.1.14)Dana Group | |||
| Strunz Class: |
IV/J.07-20* IV - Oxides | ||
| IV/J - Arsenides with [AsO3]3-, [AsO2]-, [As2O5]4- groups and unclassified Arsenides | |||
| IV/J.07 - Karibibite - Ludlockite series | |||
Other Ludlockite-(Pb) Information |
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| 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 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas Search for Ludlockite-(Pb) using: Visit our Advertisers for Ludlockite-(Pb) : Translate Ludlockite-(Pb) Mineral Data : Ask about Ludlockite-(Pb) here : Print or Cut-and-Paste your Ludlockite-(Pb) Specimen Label here :
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