Mineralogy Database

Massicot Mineral Data

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General Massicot Information

Help on Chemical  Formula: Chemical Formula: PbO
Help on Composition: Composition: Molecular Weight = 223.20 gm
   Lead    92.83 %  Pb  100.00 % PbO
   Oxygen   7.17 %  O
          ______        ______ 
          100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: PbO
Help on Environment: Environment: Rare mineral of secondary origin associated with galena. Dimorphous with litharge.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1841
Help on Locality: Locality: Stolberg, near Aachen, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: French name for lead oxide.
Help on Name Pronunciation: Name Pronunciation: Massicot Say MASSICOT
Help on Synonym: Synonym: ICSD 15402
  Lead Monoxide
  PDF 38-1477

Massicot Image

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Comments: Small nugget of reddish-yellow massicot.
Location: Wytheville, Wythe Co., Virginia, USA. Scale: 18x10x5 mm.
© John Betts - Fine Minerals

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  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

Massicot Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.1558:1:1.2405
Help on Cell Dimensions: Cell Dimensions: a = 5.459, b = 4.723, c = 5.859, Z = 4; V = 151.06 Den(Calc)= 9.81
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbma
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.067(1), 2.946(0.31), 2.744(0.28),

Physical Properties of Massicot

Help on Cleavage: Cleavage: {100} Distinct, {010} Distinct
Help on Color: Color: Yellow, Reddish yellow.
Help on Density: Density: 9.642
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Scaly - Morphology like fish scales.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: light yellow

Optical Properties of Massicot

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.255 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.234 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1641,KPDmeas= 0.167,KC= 0.133
Ncalc = 2.28 - 2.3
Help on Optical Data: Optical Data: Biaxial (+), a=2.51, b=2.61, g=2.71, bire=0.2000, 2V(Calc)=86, 2V(Meas)=90. Dispersion none.

Calculated Properties of Massicot

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=7.91 gm/cc
note: Specific Gravity of Massicot =9.81 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.2
Boson Index = 0.8
Help on Photoelectric: Photoelectric: PEMassicot =1,767.06 barns/electron
U=PEMassicot x rElectron Density=13979.75 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Massicot is Not Radioactive

Massicot Classification

Help on  Dana Class: Dana Class: (04)Simple Oxides
  (04.02)with a cation charge of 2+ (A++ O)
  (04.02.07)Dana Group Massicot PbO Pbma 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.AC.25 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.A - Metal:Oxygen = 2.1 and 1:1
  04.AC -M:O = 1:1 (and up to 1:1.25); with large cations (� smaller ones)
04.AC.25 Massicot PbO Pbma 2/m 2/m 2/m

Other Massicot Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Massicot :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 04.AC.25





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