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:

Massicot

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

Images:

Massicot Litharge

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

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 - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbma

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

By Intensity(I/I_o): 3.067(1), 2.946(0.31), 2.744(0.28),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Hill R J , Acta Crystallographica, Section C , 41 (1985) p.1281-1284, Refinement of the structure of orthorhombic PbO (massicot) by, Rietveld analysis of neutron powder diffraction data, Locality: synthetic: Merck pro analyse (batch number 0093820)

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:

PE_Massicot=1,767.06 barns/electron
U=PE_Massicot x rElectron 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 :

A Bijoux Google Search for Massicot
Adam's Minerals Google Search for Massicot
Cape Minerals Google Search for Massicot
Dakota Matrix Minerals Google Search for Massicot
Excalibur Mineral Corp. Google Search for Massicot
Exceptional Minerals Google Search for Massicot
John Betts Fine Minerals Search for Massicot
McDougall Minerals Google Search for Massicot
Mineral News Website Link
Rock and Mineral Shows Google Search for Massicot
Weinrich Minerals, Inc. Google Search 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 Español

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: