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Leadhillite

Leadhillite is a lead sulfate carbonate hydroxide mineral, often associated with anglesite. It has the formula Pb4SO4(CO3)2(OH)2. Leadhillite crystallises in the monoclinic system, but develops pseudo-hexagonal forms due to crystal twinning. It forms transparent to translucent variably coloured crystals with an adamantine lustre. It is quite soft with a…

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2V angle
10°
Alters to
Galena, calcite and susannite may alter to leadhillite. Leadhillite may alter to cerussite, calcite and susannite
Birefringence
0.140
Category
Carbonate minerals
Cleavage
Perfect on {001}
Colour
Colourless to white, grey, yellowish, pale green to blue

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Unit cell

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Optical properties

Physical properties

Occurrence

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Leadhillite

Nodes57
Edges56
Triples71
Avg. degree1.96
Density0.035088
Components1

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Leadhillite

Top relations

related to Occurrence · 8
Leadhillite → Heating, It, Leadhills, Scotland, Strathclyde, Susanna Mine, The, UK
related to Optical properties · 8
Leadhillite → An, Compare, For, In, It, The, This, When
related to Structure · 7
Leadhillite → All, Pairs, Pb, PbCO3, SO4, The, The Pb
related to Appearance · 5
Leadhillite → Crystals, Prismatic, Tabular, The, When
related to Physical properties · 5
Leadhillite → Cleavage, HNO3, It, That, The
related to Unit cell · 4
Leadhillite → It, P21/a, The, There
is a · 2
Leadhillite → lead sulfate carbonate hydroxide mineral, secondary mineral found in the oxidised zone of lead deposits associated with cerussite
2V angle · 1
Leadhillite → 10°
Alters to · 1
Leadhillite → Galena, calcite and susannite may alter to leadhillite. Leadhillite may alter to cerussite, calcite and susannite
Birefringence · 1
Leadhillite → 0.140

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Important terminology

susannite sulfate cerussite carbonate mineral lead monoclinic leadhills may crystal formula lustre forms transparent locality calcite plane refractive 2v crystals

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Leadhillite2V angle10°1.00infobox
LeadhilliteAlters toGalena, calcite and susannite may alter to leadhillite. Leadhillite may alter to cerussite, calcite and susannite1.00infobox
LeadhilliteBirefringence0.1401.00infobox
LeadhilliteCategoryCarbonate minerals1.00infobox
LeadhilliteCleavagePerfect on {001}1.00infobox
LeadhilliteColourColourless to white, grey, yellowish, pale green to blue1.00infobox
LeadhilliteCrystal classPrismatic (2/m) (same H-M symbol)1.00infobox
LeadhilliteCrystal habitUsually pseudo-hexagonal, thin to thick tabular {001} with hexagonal outline1.00infobox
LeadhilliteCrystal systemMonoclinic1.00infobox
LeadhilliteDana classification17.1.2.11.00infobox
LeadhilliteDiaphaneityTransparent to translucent1.00infobox
LeadhilliteDispersionStrong, r<v1.00infobox
LeadhilliteFormulaPb4SO4(CO3)2(OH)21.00infobox
LeadhilliteFormula mass1,078.90 g/mol1.00infobox
LeadhilliteFractureIrregular to conchoidal1.00infobox
LeadhilliteIMA symbolLhl1.00infobox
LeadhilliteLustreAdamantine, resinous, pearly1.00infobox
LeadhilliteMohs scale hardness.mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;vertical-align:super}.mw-parser-output .frac .de…1.00infobox
LeadhilliteOptical propertiesBiaxial (−)1.00infobox
LeadhilliteOther characteristicsNot radioactive1.00infobox
LeadhilliteRefractive indexnα = 1.87, nβ = 2.00, nγ = 2.011.00infobox
LeadhilliteSolubilitySoluble in HNO31.00infobox
LeadhilliteSpace groupP21/a1.00infobox
LeadhilliteSpecific gravity6.551.00infobox
LeadhilliteStreakWhite1.00infobox
LeadhilliteStrunz classification5.BF.401.00infobox
LeadhilliteTenacitysectile1.00infobox
LeadhilliteTwinningCommonly twinned, twin plane {140}1.00infobox
LeadhilliteUltraviolet fluorescenceYellowish fluorescence in LW or SW UV1.00infobox
LeadhilliteUnit cella = 9.11, b = 20.82 c = 11.59 [Å]; β = 90.46°; Z = 81.00infobox

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