Litharge Mineral Data

Litharge Mineral Data +

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General Litharge Information

Chemical Formula:

PbO

Composition:

Molecular Weight = 223.20 gm

Lead 92.83 % Pb 100.00 % PbO

Oxygen 7.17 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

PbO

Environment:

Dimorphous with massicot.

IMA Status:

Valid Species (Pre-IMA) 1917

Locality:

Cucamonga Peak, San Bernardino Co., California, USA. Link to MinDat.org Location Data.

Name Origin:

Named in 1917 from a Greek word given by Diocorides to a material obtained in the process of separating lead from silver by pyrometallurgy.

Synonym:

ICSD 62842

PDF 5-561

Litharge Image

Images:

Litharge Massicot

Comments: Dark red litharge with brownish-yellow scaly massicot and white cerussite.
Location: Patagonia, Santa Cruz County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Litharge Crystallography

Axial Ratios:

a:c = 1:1.26332

Cell Dimensions:

a = 3.976, c = 5.023, Z = 2; V = 79.41 Den(Calc)= 9.33

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/nmm

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

By Intensity(I/I_o): 3.115(1), 2.809(0.62), 1.872(0.37),

Physical Properties of Litharge

Cleavage:

[110] Distinct

Color:

Red.

Density:

9.14 - 9.355, Average = 9.24

Diaphaniety:

Transparent

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Hardness:

2 - Gypsum

Luminescence:

Non-fluorescent.

Luster:

Greasy (Oily)

Streak:

red

Optical Properties of Litharge

Gladstone-Dale:

CI meas= -0.301 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.289 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1715,KPDmeas= 0.173,KC= 0.133

Optical Data:

Uniaxial (-), e=2.535, w=2.665, bire=0.1300.

Calculated Properties of Litharge

Electron Density:

r_electron=7.52 gm/cc
note: r_Litharge=9.33 gm/cc.

Fermion Index

Fermion Index = 0.20519
Boson Index = 0.79481

Photoelectric:

PE_Litharge=1,767.06 barns/electron
U=PE_Litharge x r_electron=13295.73 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Litharge is Not Radioactive

Litharge Classification

Dana Class:

4.2.4.1 (4)Simple Oxides

(4.2)with a cation charge of 2+ (A++ O)

(4.2.4)Dana Group

4.2.4.1 Litharge PbO P 4/nmm 4/m 2/m 2/m

Strunz Class:

IV/A.06-20 IV - Oxides

IV/A - Oxides with metal : oxygen = 1:1 and 2:1 (M2O,MO)

IV/A.06 - Periclase Group, Montroydite - Massicotite series

IV/A.06-10 Montroydite HgO P nma 2/m 2/m 2/m

IV/A.06-20 Litharge PbO P 4/nmm 4/m 2/m 2/m

IV/A.06-30 Massicot PbO Pbma 2/m 2/m 2/m

Other Litharge Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

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Print or Cut-and-Paste your Litharge Specimen Label here :

Litharge

PbO
Dana No: 4.2.4.1 Strunz No: IV/A.06-20
Locality:

Notes: