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Pentagonite

Pentagonite is a rare phyllosilicate mineral with formula Ca(VO)Si4O10·4H2O. Its characteristic blue color is due to the presence of the vanadyl (.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{display:block;text-align:left}.mw-parser-output…

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2V angle
Measured: 50°
Birefringence
δ = 0.014
Category
Phyllosilicate minerals
Cleavage
Good on {010}
Color
Greenish blue
Crystal class
Pyramidal (mm2) (same H-M symbol)

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Overview

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Map overview Semantic statistics

Pentagonite

Nodes18
Edges17
Triples23
Avg. degree1.89
Density0.111111
Components1

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Pentagonite

Top relations

2V angle · 1
Pentagonite → Measured: 50°
Birefringence · 1
Pentagonite → δ = 0.014
Category · 1
Pentagonite → Phyllosilicate minerals
Cleavage · 1
Pentagonite → Good on {010}
Color · 1
Pentagonite → Greenish blue
Crystal class · 1
Pentagonite → Pyramidal (mm2) (same H-M symbol)
Crystal habit · 1
Pentagonite → Prismatic crystals, often as radiating clusters
Crystal system · 1
Pentagonite → Orthorhombic
Diaphaneity · 1
Pentagonite → Transparent
Formula · 1
Pentagonite → Ca(VO)Si4O10·4H2O

Important terminology Word statistics

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Important terminology

vanadyl cavansite cation state occurs phyllosilicate formula ca vo si4o10 4h2o blue color crystal twinning symmetry references fiveling dimorph tuff

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Pentagonite2V angleMeasured: 50°1.00infobox
PentagoniteBirefringenceδ = 0.0141.00infobox
PentagoniteCategoryPhyllosilicate minerals1.00infobox
PentagoniteCleavageGood on {010}1.00infobox
PentagoniteColorGreenish blue1.00infobox
PentagoniteCrystal classPyramidal (mm2) (same H-M symbol)1.00infobox
PentagoniteCrystal habitPrismatic crystals, often as radiating clusters1.00infobox
PentagoniteCrystal systemOrthorhombic1.00infobox
PentagoniteDiaphaneityTransparent1.00infobox
PentagoniteFormulaCa(VO)Si4O10·4H2O1.00infobox
PentagoniteIMA symbolPtg1.00infobox
PentagoniteLusterVitreous1.00infobox
PentagoniteMohs scale hardness3 - 41.00infobox
PentagoniteOptical propertiesBiaxial (-)1.00infobox
PentagonitePleochroismVisible: X=Z= colorless Y= blue1.00infobox
PentagoniteRefractive indexnα = 1.533 nβ = 1.544 nγ = 1.5471.00infobox
PentagoniteSpace groupCcm211.00infobox
PentagoniteSpecific gravity2.331.00infobox
PentagoniteStrunz classification9.EA.551.00infobox
PentagoniteTenacityBrittle1.00infobox
PentagoniteTwinningMultiple twins producing a pseudo-pentagonal symmetry1.00infobox
PentagoniteUnit cella = 10.386(4) Å, b = 14.046(7) Å, c = 8.975(2) Å; Z = 41.00infobox
Pentagoniteis arare phyllosilicate mineral with formula Ca0.90text

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