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Danburite

Danburite is a calcium boron silicate mineral with a chemical formula of CaB2(SiO4)2.

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2V angle
88 to 90° measured
Birefringence
δ = 0.006
Category
Tectosilicate minerals
Cleavage
{001} Poor
Colour
Colourless, white, gray, brownish white, straw yellow
Crystal class
Rhombic dipyramidal (mmm)

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Map overview Semantic statistics

Danburite

Nodes15
Edges14
Triples30
Avg. degree1.87
Density0.133333
Components1

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Danburite

Top relations

related to External links · 3
Danburite → Media, Wikimedia Commons, Wiktionary-logo-en-v2
2V angle · 1
Danburite → 88 to 90° measured
Birefringence · 1
Danburite → δ = 0.006
Category · 1
Danburite → Tectosilicate minerals
Cleavage · 1
Danburite → {001} Poor
Colour · 1
Danburite → Colourless, white, gray, brownish white, straw yellow
Crystal class · 1
Danburite → Rhombic dipyramidal (mmm)
Crystal habit · 1
Danburite → Euhedral prismatic crystals; disseminated masses
Crystal system · 1
Danburite → Orthorhombic
Dana classification · 1
Danburite → 56.3.1.1

Important terminology Word statistics

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Important terminology

crystal orthorhombic tectosilicate mineral form either pnam formula cab2 sio4 mohs hardness specific gravity colourless yellow dana classification minerals strunz

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Danburite2V angle88 to 90° measured1.00infobox
DanburiteBirefringenceδ = 0.0061.00infobox
DanburiteCategoryTectosilicate minerals1.00infobox
DanburiteCleavage{001} Poor1.00infobox
DanburiteColourColourless, white, gray, brownish white, straw yellow1.00infobox
DanburiteCrystal classRhombic dipyramidal (mmm)1.00infobox
DanburiteCrystal habitEuhedral prismatic crystals; disseminated masses1.00infobox
DanburiteCrystal systemOrthorhombic1.00infobox
DanburiteDana classification56.3.1.11.00infobox
DanburiteDiaphaneityTransparent to translucent1.00infobox
DanburiteDispersionr < v strong1.00infobox
DanburiteFormulaCaB2(SiO4)21.00infobox
DanburiteFractureSubconchoidal to uneven1.00infobox
DanburiteIMA statusGrandfathered (1839)1.00infobox
DanburiteIMA symbolDbu1.00infobox
DanburiteLustreVitreous to greasy1.00infobox
DanburiteMohs scale hardness7 – 7.51.00infobox
DanburiteOptical propertiesBiaxial (+/-)1.00infobox
DanburiteRefractive indexnα = 1.627 – 1.633 nβ = 1.630 – 1.636 nγ = 1.633 – 1.6391.00infobox
DanburiteSpace groupPnam (no. 62)1.00infobox
DanburiteSpecific gravity2.93 – 3.021.00infobox
DanburiteStreakWhite1.00infobox
DanburiteStrunz classification9.FA.651.00infobox
DanburiteTenacityBrittle1.00infobox
DanburiteUltraviolet fluorescenceFluorescent and thermoluminescent (red); Short UV=violet blue; Long UV=blue to blue-green1.00infobox
DanburiteUnit cella = 8.038(3), b = 8.752(5) c = 7.73 [Å]; Z = 41.00infobox
Danburiteis acalcium boron silicate mineral with a chemical formula of CaB20.90text

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