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Bayldonite

Bayldonite (BAIL-done-ite) is a rare secondary mineral with the chemical formula PbCu3(AsO4)2(OH)2. Its provenance has been attributed to Penberthy Croft Mine, Cornwall, England, United Kingdom but there is no substantiating evidence for this and it was only attributed to Cornwall by Church (1865). Also, Church’s paper (Church, 1865) clearly states “I am…

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2V angle
89°
Birefringence
0.040
Category
Arsenate minerals
Cleavage
None observed
Color
Green, apple-green
Crystal class
Prismatic (2/m) (same H-M symbol)

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Bayldonite

Nodes9
Edges8
Triples25
Avg. degree1.78
Density0.222222
Components1

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Bayldonite

Top relations

2V angle · 1
Bayldonite → 89°
Birefringence · 1
Bayldonite → 0.040
Category · 1
Bayldonite → Arsenate minerals
Cleavage · 1
Bayldonite → None observed
Color · 1
Bayldonite → Green, apple-green
Crystal class · 1
Bayldonite → Prismatic (2/m) (same H-M symbol)
Crystal habit · 1
Bayldonite → Mammillary crust
Crystal system · 1
Bayldonite → Monoclinic
Density · 1
Bayldonite → 5.24–5.65 g/cm3 (measured), 5.707 g/cm3 (calculated)
Diaphaneity · 1
Bayldonite → Transparent, translucent

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Important terminology

also tsumeb namibia mineral united church 1865 states bayldon formula pbcu3 aso4 oh cornwall references arizona gemstone bail-done-ite rare secondary

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Bayldonite2V angle89°1.00infobox
BayldoniteBirefringence0.0401.00infobox
BayldoniteCategoryArsenate minerals1.00infobox
BayldoniteCleavageNone observed1.00infobox
BayldoniteColorGreen, apple-green1.00infobox
BayldoniteCrystal classPrismatic (2/m) (same H-M symbol)1.00infobox
BayldoniteCrystal habitMammillary crust1.00infobox
BayldoniteCrystal systemMonoclinic1.00infobox
BayldoniteDensity5.24–5.65 g/cm3 (measured), 5.707 g/cm3 (calculated)1.00infobox
BayldoniteDiaphaneityTransparent, translucent1.00infobox
BayldoniteDispersionr < v strong1.00infobox
BayldoniteExtinctionY^elongation = 45°; X=b1.00infobox
BayldoniteFormulaPbCu3(AsO4)2(OH)21.00infobox
BayldoniteFractureIrregular/uneven, conchoidal, sub-conchoidal, fibrous1.00infobox
BayldoniteIMA symbolBay1.00infobox
BayldoniteLusterResinous, waxy, greasy1.00infobox
BayldoniteMohs 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
BayldoniteOptical propertiesBiaxial (+)1.00infobox
BayldonitePleochroismNon-pleochroic1.00infobox
BayldoniteRefractive indexnα = 1.951 nβ = 1.970 nγ = 1.9911.00infobox
BayldoniteSpace groupC2/c1.00infobox
BayldoniteStreakSiskin green to apple green1.00infobox
BayldoniteStrunz classification8.BH.451.00infobox
BayldoniteTenacityBrittle1.00infobox
BayldoniteTwinningPseudoscalenohedral trillings with the composition plane1.00infobox

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