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Segnitite

Segnitite is a lead iron(III) arsenate mineral. Segnitite was first found in the Broken Hill ore deposit in Broken Hill, New South Wales, Australia. In 1991, segnitite was approved as a new mineral. Segnitite has since been found worldwide near similar locality types where rocks are rich in zinc and lead especially. it was named for Australian…

Occurrence, Chemical composition & Optical properties

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Birefringence
δ = 0.020
Category
Arsenate minerals
Cleavage
Distinct on {001}
Color
Greenish brown to yellowish brown and dark brown
Crystal class
Hexagonal scalenohedral – 3m (32/m)
Crystal habit
Tabular, rhombohedral, pseudo-octahedral, pseudo-cubic and very rarely also acicular crystals.

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Overview

Chemical composition

Crystal structure and habit

Occurrence

Crystallography

Optical properties

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Segnitite

Nodes55
Edges54
Triples77
Avg. degree1.96
Density0.036364
Components1

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Segnitite

Top relations

related to Chemical composition · 19
Segnitite → AB3, AsO3OH, AsO4, Fe2, Four, H2O, Minerals, More, OH, Pb1, PbFe3, PbFe3H, PO4, R3m, SO4, The, Through, TO4, XO4
related to Crystallography · 9
Segnitite → Before, Beundantite, R3m, The, There, Through X-ray, Using, X-ray, XRD
related to Occurrence · 9
Segnitite → Australia, Austria, Broken Hill, Germany, It, Many, New South Wales, Switzerland, Western Europe
is a · 5
Segnitite → arsenic rich end member of the lusugnite group.Through electron microprobe analysis on the basis of 14 oxygen atoms, lead iron, part of the alunite-jarosite family which is a part of the alunite supergroup, part of the low-S lusungite group of alunite-jarosite minerals, relatively uncommon mineral
related to Optical properties · 4
Segnitite → Dichroism, Minerals, The, UV
related to Crystal structure and habit · 3
Segnitite → Pinacoid, Rhombohedron, The
Birefringence · 1
Segnitite → δ = 0.020
Category · 1
Segnitite → Arsenate minerals
Cleavage · 1
Segnitite → Distinct on {001}
Color · 1
Segnitite → Greenish brown to yellowish brown and dark brown

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Important terminology

minerals found mineral group chemical space ore many lead arsenate crystal composition formula oh well lepidocrocite sulfur similar commonly new

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
SegnititeBirefringenceδ = 0.0201.00infobox
SegnititeCategoryArsenate minerals1.00infobox
SegnititeCleavageDistinct on {001}1.00infobox
SegnititeColorGreenish brown to yellowish brown and dark brown1.00infobox
SegnititeCrystal classHexagonal scalenohedral – 3m (32/m)1.00infobox
SegnititeCrystal habitTabular, rhombohedral, pseudo-octahedral, pseudo-cubic and very rarely also acicular crystals.1.00infobox
SegnititeCrystal systemTrigonal1.00infobox
SegnititeDana classification42.7.4.41.00infobox
SegnititeDiaphaneityTransparent to translucent1.00infobox
SegnititeFormulaLead iron(III) arsenate, .mw-parser-output .template-chem2-su{display:inline-block;font-size:80%;line-height:1;vertical-align:-0.35em}.mw-parser-output .template-chem2-su>span{d…1.00infobox
SegnititeFractureRough, irregular, uneven1.00infobox
SegnititeIMA symbolSgt1.00infobox
SegnititeLusterAdamantine to vitreous1.00infobox
SegnititeMohs scale hardness41.00infobox
SegnititeOptical propertiesUniaxial (−), e=1.955, w=1.9751.00infobox
SegnititePleochroismPale to moderate yellow1.00infobox
SegnititeRefractive indexnω = 1.955 to 1.975, nε = 1.9751.00infobox
SegnititeSpace groupR3m1.00infobox
SegnititeSpecific gravity4.21.00infobox
SegnititeStreakPale yellow1.00infobox
SegnititeStrunz classification7/B.36-1651.00infobox
SegnititeTenacityBrittle1.00infobox
SegnititeTwinningNot well observed1.00infobox
SegnititeUnit cella = 7.359(3) Å, c = 17.113(8) Å, V = 802.6(6) Å3+, Z = 61.00infobox
Segnititeis alead iron0.90text
Segnititeis apart of the alunite-jarosite family which is a part of the alunite supergroup0.90text
Segnititeis apart of the low-S lusungite group of alunite-jarosite minerals0.90text
Segnititeis aarsenic rich end member of the lusugnite group.Through electron microprobe analysis on the basis of 14 oxygen atoms0.90text
Segnititeis arelatively uncommon mineral0.90text

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