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:

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

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

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

By Intensity(I/I_o): 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:

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 (ï¿½ 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

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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
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