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Ceylonite

Ceylonite (first cited 1793) and pleonaste (first cited 1801) or pleonast are dingy blue or grey-to-black varieties of spinel. Ceylonite, named for the island of Ceylon, is a ferroan spinel mineral with Mg:Fe from 3:1 and 1:1, and little or no ferric iron. Pleonaste is named from the Greek for 'abundant,' for its many crystal forms, and is distinguished…

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Occurrence

GneissGraphicGraniteVeinIgneous rocks
6 related topics

Structure

Bravais lattice
1 related topics

Overview

SpinelCeylonFerricGreek
4 related topics

Key facts & relationships

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Category
Oxide minerals Spinel group Spinel structural group
Cleavage
Indistinct
Color
Various; red to blue to mauve, dark green, brown, black
Crystal habit
Cubic, octahedral
Crystal system
Isometric
Diaphaneity
Transparent to translucent

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Occurrence

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Map overview Semantic statistics

Ceylonite

Nodes15
Edges14
Triples80
Avg. degree1.87
Density0.133333
Components1

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Ceylonite

Top relations

related to References · 36
Ceylonite → American Ceramic Society, Bacorisen, Ball, Ceylon Branch, Chemistry, Defect, Desa, Earth, Gemdat, Geology Today, George, Grimes, Journal, June, King, Marine Geology, MgAl2O4, Minerals, Murphy, No
related to Structure · 11
Ceylonite → A-block, Al2O4, Al3, Bravais, Fd3m, Fe2, Magnesium, Mg2, The, This, Within
related to Composition · 10
Ceylonite → Al2O4, Al3, Cr3, Fe2, Fe3, It, Mg, Mg2, Mn2, The
related to Occurrence · 5
Ceylonite → Ceylon, On, Sri Lanka, The, This
Category · 1
Ceylonite → Oxide minerals Spinel group Spinel structural group
Cleavage · 1
Ceylonite → Indistinct
Color · 1
Ceylonite → Various; red to blue to mauve, dark green, brown, black
Crystal habit · 1
Ceylonite → Cubic, octahedral
Crystal system · 1
Ceylonite → Isometric
Diaphaneity · 1
Ceylonite → Transparent to translucent

Important terminology Word statistics

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Important terminology

spinel mg mineral pleonaste fe composition formula al2o4 ceylon fe2 spinels first named structure oxide minerals group octahedral blue crystal

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
CeyloniteCategoryOxide minerals Spinel group Spinel structural group1.00infobox
CeyloniteCleavageIndistinct1.00infobox
CeyloniteColorVarious; red to blue to mauve, dark green, brown, black1.00infobox
CeyloniteCrystal habitCubic, octahedral1.00infobox
CeyloniteCrystal systemIsometric1.00infobox
CeyloniteDiaphaneityTransparent to translucent1.00infobox
CeyloniteFormula.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:l…1.00infobox
CeyloniteFractureConchoidal, uneven1.00infobox
CeyloniteLusterVitreous1.00infobox
CeyloniteMohs scale hardness7.5–8.01.00infobox
CeyloniteOptical propertiesIsotropic1.00infobox
CeyloniteOther characteristicsNonmagnetic, non-radioactive, sometimes fluorescent (red)1.00infobox
CeylonitePleochroismAbsent1.00infobox
CeyloniteRefractive index1.770-1.7801.00infobox
CeyloniteSolubilitynone1.00infobox
CeyloniteSpecific gravity3.6–3.91.00infobox
CeyloniteStreakWhite1.00infobox

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