![]() |
Ludlockite Mineral Data |
General Ludlockite Information |
|||
![]() |
(Fe++,Pb)As+++++2O6 | ||
![]() |
Molecular Weight = 309.25 gm | ||
Iron 17.16 % Fe 22.07 % FeO | |||
Arsenic 48.45 % As 74.32 % As2O5 | |||
Lead 3.35 % Pb 3.61 % PbO | |||
Oxygen 31.04 % O | |||
______ ______ | |||
100.00 % 100.00 % = TOTAL OXIDE | |||
![]() |
Fe2+0.95Pb0.05As2O6 | ||
![]() |
Oxidized ore bodies containing lead, iron, and As bearing sulfosalts. Found with zincian siderite in the "germanite section" at Tsumeb. | ||
![]() |
Approved IMA 1970 | ||
![]() |
In a boulder of ore found at Tsumeb, Namibia. Link to MinDat.org Location Data. | ||
![]() |
Named for F. Ludlow Smith III and C. Locke Key, mineral collectors and dealers in New Jersy. | ||
![]() |
Ludlockite + Pronunciation ![]() |
||
![]() |
ICSD 82486 | ||
Ludlockite-Pb | |||
PDF 29-774 | |||
Ludlockite Image | |||
![]() |
|
||
Ludlockite Crystallography |
|||
![]() |
a:b:c =0.846:1:0.8251 | ||
![]() |
a = 10.11, b = 11.95, c = 9.86, Z = 9; alpha = 113.9°, beta = 99.7°, gamma = 82.74° V = 1,064.91 Den(Calc)= 4.34 | ||
![]() |
Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: A1 | ||
![]() |
By Intensity(I/Io): 8.81(1), 2.94(0.9), 2.86(0.7),3.16(0.7), 3.33(0.7), 4.47(0.6), 4.74(0.6), 10.9(0.6), 3.33(0.4), | ||
Physical Properties of Ludlockite |
|||
![]() |
{011} Good, {???} Good | ||
![]() |
Copper red. | ||
![]() |
4.35 - 4.4, Average = 4.37 | ||
![]() |
Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite). | ||
![]() |
Acicular - Occurs as needle-like crystals. | ||
![]() |
1.5-2 - Talc-Gypsum | ||
![]() |
Subadamantine | ||
![]() |
light brown | ||
Optical Properties of Ludlockite |
|||
![]() |
CI meas= -0.428 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.45 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2417,KPDmeas= 0.2381,KC= 0.1667 Ncalc = 1.72 - 1.73 |
||
![]() |
Biaxial (+), a=1.96, b=2.055, g=2.11, bire=0.1500 | ||
![]() |
yellow. | ||
![]() |
deep yellow. | ||
![]() |
orange yellow. | ||
Calculated Properties of Ludlockite |
|||
![]() |
Bulk Density (Electron Density)=4.04 gm/cc note: Specific Gravity of Ludlockite =4.38 gm/cc. |
||
![]() |
Fermion Index = 0.01 Boson Index = 0.99 |
||
![]() |
PELudlockite = 95.04 barns/electron U=PELudlockite x rElectron Density= 383.99 barns/cc. |
||
![]() |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Ludlockite is Not Radioactive |
||
Ludlockite Classification |
|||
![]() |
38.05.04.01 (38)Anhydrous Phosphates, etc | ||
(38.05)with miscellaneous formulae | |||
(38.05.04)Dana Group | |||
![]() |
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 | |||
Other Ludlockite Information |
|||
![]() |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) | ||
![]() |
Links to other databases for Ludlockite : 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 - HyperPhysics 11 - MinDAT 12 - Mineralienatlas (Deutsch) 13 - Online Mineral Museum 14 - QUT Mineral Atlas 15 - Ruff.Info 16 - WWW-MINCRYST Search for Ludlockite using: Visit our Advertisers for Ludlockite : Ask about Ludlockite here : Print or Cut-and-Paste your Ludlockite Specimen Label here :
|
||
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.