Massicot Mineral Data
General Massicot 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:
Rare mineral of secondary origin associated with galena. Dimorphous with litharge.
IMA Status:
Valid Species (Pre-IMA) 1841
Locality:
Stolberg, near Aachen, Germany. Link to MinDat.org Location Data.
Name Origin:
French name for lead oxide.
Name Pronunciation:
Massicot
Synonym:
ICSD 15402
Lead Monoxide
PDF 38-1477
Massicot Image
Images:
Images:
Massicot Crystallography
Axial Ratios:
a:b:c =1.1558:1:1.2405
Cell Dimensions:
a = 5.459, b = 4.723, c = 5.859, Z = 4; V = 151.06 Den(Calc)= 9.81
Crystal System:
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbma
X Ray Diffraction:
By Intensity(I/Io ): 3.067(1), 2.946(0.31), 2.744(0.28),
Physical Properties of Massicot
Cleavage:
{100} Distinct, {010} Distinct
Color:
Yellow, Reddish yellow.
Density:
9.642
Diaphaneity:
Translucent
Fracture:
Flexible - Flexible fragments.
Habit:
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Habit:
Massive - Uniformly indistinguishable crystals forming large masses.
Habit:
Scaly - Morphology like fish scales.
Hardness:
2 - Gypsum
Luminescence:
Non-fluorescent.
Luster:
Adamantine
Streak:
light yellow
Optical Properties of Massicot
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
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
Electron Density:
Bulk Density (Electron Density)=7.91 gm/cc note: Specific Gravity of Massicot =9.81 gm/cc.
Fermion Index:
Fermion Index = 0.2 Boson Index = 0.8
Photoelectric:
PEMassicot =1,767.06 barns/electronU=PEMassicot x r Electron Density=13979.75 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Massicot is Not Radioactive
Massicot Classification
Dana Class:
04.02.07.01 (04) Simple Oxides
(04.02) with a cation charge of 2+ (A++ O)
(04.02.07) Dana Group
04.02.07.01 Massicot PbO Pbma 2/m 2/m 2/m
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
References:
NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
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
16 - WWW-MINCRYST
Search for Massicot using:
[AOL ]
[Bing ]
[Dog Pile ]
[GeoScienceWorld ]
[HotBot ]
[Ixquick ]
[Lycos ]
[MAMMA ]
[Scirus ]
[Teoma ]
[WebCrawler ]
[Wikipedia ]
[YAHOO ]
Visit our Advertisers for Massicot :
Ask about Massicot 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
Espa�ol
Print or Cut-and-Paste your Massicot Specimen Label here :
Massicot
PbO
Dana No: 04.02.07.01 Strunz No: 04.AC.25
Locality:
Notes:
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.