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Massicot

Massicot is a lead (II) oxide mineral with an orthorhombic lattice structure. Lead(II) oxide (formula: PbO) can occur in one of two lattice formats, orthorhombic and tetragonal. The red tetragonal form is called litharge. PbO can be changed from massicot to litharge (or vice versa) by controlled heating and cooling. At room temperature massicot forms…

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2V angle
Measured: 90°, calculated: 86°
Birefringence
δ = 0.200
Category
Oxide mineral
Cleavage
Distinct on {100} and {010}
Color
Yellow may have a red tint
Crystal class
Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)

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Massicot

Nodes18
Edges17
Triples28
Avg. degree1.89
Density0.111111
Components1

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Massicot

Top relations

2V angle · 1
Massicot → Measured: 90°, calculated: 86°
Birefringence · 1
Massicot → δ = 0.200
Category · 1
Massicot → Oxide mineral
Cleavage · 1
Massicot → Distinct on {100} and {010}
Color · 1
Massicot → Yellow may have a red tint
Crystal class · 1
Massicot → Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)
Crystal habit · 1
Massicot → Scaly as incrustations, massive
Crystal system · 1
Massicot → Orthorhombic
Diaphaneity · 1
Massicot → Translucent
Dispersion · 1
Massicot → Strong

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Important terminology

pbo orthorhombic litharge lead oxide mineral may tetragonal ii lattice occur found natural industrial processing substance minerals formula red mohs

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Massicot2V angleMeasured: 90°, calculated: 86°1.00infobox
MassicotBirefringenceδ = 0.2001.00infobox
MassicotCategoryOxide mineral1.00infobox
MassicotCleavageDistinct on {100} and {010}1.00infobox
MassicotColorYellow may have a red tint1.00infobox
MassicotCrystal classDipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)1.00infobox
MassicotCrystal habitScaly as incrustations, massive1.00infobox
MassicotCrystal systemOrthorhombic1.00infobox
MassicotDiaphaneityTranslucent1.00infobox
MassicotDispersionStrong1.00infobox
MassicotFormulaPbO1.00infobox
MassicotFractureFlexible1.00infobox
MassicotIMA symbolMsi1.00infobox
MassicotLusterGreasy to dull1.00infobox
MassicotMohs scale hardness21.00infobox
MassicotOptical propertiesBiaxial (+)1.00infobox
MassicotPleochroismY = light sulfur-yellow; Z = deep yellow1.00infobox
MassicotRefractive indexnα = 2.510 nβ = 2.610 nγ = 2.7101.00infobox
MassicotSpace groupPbcm1.00infobox
MassicotSpecific gravity9.642 calculated1.00infobox
MassicotStreakYellow1.00infobox
MassicotStrunz classification4.AC.251.00infobox
MassicotUnit cella = 5.4903 Å, b = 5.892 Å, c = 4.752 Å; Z = 41.00infobox
Massicotis alead0.90text

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