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Massicot

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Formula:
PbO
System:OrthorhombicColour:Sulphur- to ...
Hardness:2
Name:Derived from early arabic, through spanish mazacote and the French name for oxide of lead.
Dimorph of:Litharge
This page provides mineralogical data about Massicot.

Classification of Massicot

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:4/A.06-30
Nickel-Strunz 10th (pending) edition ID:4.AC.25

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
A : Metal: Oxygen = 2:1 and 1:1
C : M:O = 1:1 (and up to 1:1.25); with large cations (+- smaller ones)
Dana 8th edition ID:4.2.7.1

4 : SIMPLE OXIDES
2 : AX
Hey's CIM Ref.:7.11.20

7 : Oxides and Hydroxides
11 : Oxides of Sn and Pb
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Type Occurrence of Massicot

Type Locality:Binsfeldhammer lead smelter (slag locality), Stolberg, Aachen, North Rhine-Westphalia, Germany
Year of Discovery:1841

Occurrences of Massicot

Geological Setting:As an alteration product of lead minerals.

Physical Properties of Massicot

Lustre:Greasy, Dull
Colour:Sulphur- to orpiment-yellow, sometimes with a reddish tint. Nearly colourless to pale yellow in transmitted light.
Streak:Yellow
Hardness (Mohs):2
Density (measured):9.56 g/cm3
Density (calculated):9.64 g/cm3

Crystallography of Massicot

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Cmmm
Cell Parameters:a = 5.4903(1) Å, b = 5.892Å, c = 4.752Å
Ratio:a:b:c = 0.932 : 1 : 0.807
Unit Cell Volume:V 153.72 ų (Calculated from Unit Cell)
Z:4
Morphology:Massive, earthy to scaly. Artificial crystals are tabular {100}.
Twinning:Observed on artificial crystals.
X-Ray Powder Diffraction:
d-spacingIntensity
3.068 (100)
2.946 (24)
2.745 (23)
2.3767 (17)
2.0078 (13)
1.7232 (16)
1.6401 (15)

Optical Data of Massicot

Type:Biaxial (+)
RI values: nα = 2.510 nβ = 2.610 nγ = 2.710
2V:Measured: 90° , Calculated: 86°
Maximum Birefringence:δ = 0.200

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:Strong
Pleochroism:Visible
Comments:Y = light sulfur yellow
Z = deep yellow

Chemical Properties of Massicot

Formula:
PbO
Essential elements:O, Pb
All elements listed in formula:O, Pb

Relationship of Massicot to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.AC.05Swedenborgite
NaBe
 
4
Sb
5+
 
O
 
7
4.AC.10Brownmillerite
Ca
 
2
(Al,Fe
3+
 
)
 
2
O
 
5
4.AC.10Srebrodolskite
Ca
 
2
Fe
3+
2
O
 
5
4.AC.15Montroydite
HgO
4.AC.20Litharge
PbO
4.AC.20Romarchite
SnO
Related Minerals - Hey's Index Grouping:

- +
7.11.1Romarchite
SnO
7.11.2Cassiterite
SnO
 
2
7.11.4Schoenfliesite
Mg[Sn(OH)
 
6
]
7.11.5Burtite
Ca[Sn(OH)
 
6
]
7.11.6Vismirnovite
Zn[Sn(OH)
 
6
]
7.11.7Wickmanite
Mn
2+
 
[Sn(OH)
 
6
]
7.11.8Tetrawickmanite
Mn
2+
 
[Sn
4+
 
(OH)
 
6
]
7.11.9Jeanbandyite
(Fe
2+
 
,Mn
2+
 
)[Sn
4+
 
(OH)
 
6
]
7.11.10Natanite
Fe
2+
 
[Sn(OH)
 
6
]
7.11.11Mushistonite
(Cu,Zn,Fe
2+
 
)[Sn(OH)
 
6
]
7.11.12Ferronigerite-2N1S
(Al,Fe,Zn)
 
2
(Al,Sn)
 
6
O
 
11
(OH)
7.11.13Magnesionigerite
7.11.14Argutite
GeO
 
2
7.11.15Brunogeierite
Fe
2+
2
Ge
4+
 
O
 
4
7.11.16Stottite
Fe
2+
 
[Ge
4+
 
(OH)
 
6
]
7.11.17Carboirite
FeAl
 
2
(GeO
 
4
)O(OH)
 
2
7.11.18Otjisumeite
PbGe
 
4
O
 
9
7.11.19Bartelkeite
PbFe
2+
 
Ge
 
3
O
 
8
7.11.21Litharge
PbO
7.11.22Minium
Pb
 
3
O
 
4
7.11.23Plattnerite
PbO
 
2
7.11.24Scrutinyite
alpha-PbO
 
2
7.11.25Murdochite
PbCu
 
6
O
 
8-x
(Cl,Br)
 
2x
where x<=0.5
7.11.26Macedonite
PbTiO
 
3
7.11.27Cesàrolite
Pb(Mn
4+
 
)
 
3
O
 
6
(OH)
 
2
7.11.28Coronadite
Pb(Mn
4+
6
Mn
3+
2
)O
 
16
7.11.29Quenselite
PbMnO
 
2
(OH)
7.11.30Plumboferrite
Pb
 
2
Fe
3+
11-x
Mn
2+
x
O
 
19-2x
, x = 1/3
7.11.31Magnetoplumbite
(Pb,Mn)(Fe,Mn)
 
12
O
 
19
7.11.32Senaite
Pb(Ti,Fe,Mn)
 
21
O
 
38

Other Names for Massicot

Synonyms:
ChrysitinLead monoxideLead ocherMasicotiteMassicolite
MassicottiteMasticotPiombo ossidato
Other Languages:
French:Plomb oxidé jaune
German:Bleiglätte
Bleioxyd
Masicotit
Massicolit
Massicotit
Massicottit
Massikot
Silberglätte
Italian:Massicot
Russian:Массикот
Simplified Chinese:铅赭石
铅黄
Slovak:Masikot
Spanish:Litarjirio nativo
Masicotita
Massicolita
Massicottita

Other Information

Health Warning:Contains lead - always wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest.

References for Massicot

Reference List:

- +
Huot (1841): 346.

Weisbach (1875): 54.

D'Achiardi (1883): 1: 221.

Larsen, E.S. (1917), Massicot and litharge, the two modifications of lead monoxide: American Mineralogist: 2: 18-19.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 516-517.

Acta Crystallographica (1985): C41: 1281-1284.

Internet Links for Massicot

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Massicot details from Handbook of Mineralogy (PDF)
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  • Specimens:The following Massicot specimens are currently listed for sale on minfind.com.

    Localities for Massicot

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