Cordierite

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Occurrence

Metamorphism Pelitic Hornfels Pelitic Sillimanite

19 related topics

Applications

Kiln furniture Electric heating Fuses Thermostats Catalytic converters

5 related topics

Gem variety

Gemstone Pleochroism Polarization Sapphire Carats

8 related topics

Name and discovery

Níjar, Almería Spain Geologist Louis Cordier

4 related topics

Key facts & relationships

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Category: Cyclosilicate
Cleavage: Fair on {100}, poor on {001} and {010}
Color: Blue, smoky blue, bluish violet; greenish, yellowish brown, gray; colorless to very pale blue in thin section in transmitted light
Crystal class: Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)
Crystal habit: Pseudo-hexagonal prismatic twins, as imbedded grains, and massive
Crystal system: Orthorhombic

Topics to explore

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Overview

Mineralogy
Gemology
Mg Magnesium
Al Aluminium
Cyclosilicate Silicate minerals
Fe Iron
Solid solution
Sekaninaite
Si Silicon
Polymorph Polymorphism (materials science)
Indialite Indialite?action=edit&redlink=1
Isostructural
Beryl

Name and discovery

Occurrence

Commercial use

Catalytic converters Catalytic converter
Ceramics Ceramic

Gem variety

Applications

Advanced semantic analysis

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Map overview Semantic statistics

Nodes58

Edges57

Triples70

Avg. degree1.97

Density0.034483

Components1

How this topic connects Entity context

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Cordierite

Top relations

related to Gem variety · 27

Cordierite → Another, As, Australia, Brazil, Burma, Canada, Connecticut, Gem, Greek, India, Iolite, It, Light, Madagascar, Namibia, Northern Territory, Northwest Territories, Sri Lanka, Tanzania, The

related to Occurrence · 6

Cordierite → Alteration, Cornwall, Geevor Tin Mine, It, Other, Two

related to Name and discovery · 5

Cordierite → Almería, French, Louis Cordier, Níjar, Spain

related to Commercial use · 3

Cordierite → Catalytic, The, This

has application · 2

Cordierite → In, It

Category · 1

Cordierite → Cyclosilicate

Cleavage · 1

Cordierite → Fair on {100}, poor on {001} and {010}

Color · 1

Cordierite → Blue, smoky blue, bluish violet; greenish, yellowish brown, gray; colorless to very pale blue in thin section in transmitted light

Crystal class · 1

Cordierite → Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)

Crystal habit · 1

Cordierite → Pseudo-hexagonal prismatic twins, as imbedded grains, and massive

Important terminology Word statistics

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Important terminology

iolite used also pleochroism catalytic converters blue violet quartz name iron cyclosilicate thermal exists gemstone mg fe variety applications light

Entity relationships Subject–Predicate–Object triples

Subject	Predicate	Object	Confidence	Src
Cordierite	Category	Cyclosilicate	1.00	infobox
Cordierite	Cleavage	Fair on {100}, poor on {001} and {010}	1.00	infobox
Cordierite	Color	Blue, smoky blue, bluish violet; greenish, yellowish brown, gray; colorless to very pale blue in thin section in transmitted light	1.00	infobox
Cordierite	Crystal class	Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)	1.00	infobox
Cordierite	Crystal habit	Pseudo-hexagonal prismatic twins, as imbedded grains, and massive	1.00	infobox
Cordierite	Crystal system	Orthorhombic	1.00	infobox
Cordierite	Dana classification	61.02.01.01 Cordierite group	1.00	infobox
Cordierite	Diagnostic features	Resembles quartz, can be distinguished by pleochroism. Can be distinguished from corundum by its lower hardness	1.00	infobox
Cordierite	Diaphaneity	Transparent to translucent	1.00	infobox
Cordierite	Formula	.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…	1.00	infobox
Cordierite	Fracture	Subconchoidal	1.00	infobox
Cordierite	Fusibility	on thin edges	1.00	infobox
Cordierite	IMA symbol	Crd	1.00	infobox
Cordierite	Luster	Greasy or vitreous	1.00	infobox
Cordierite	Mohs scale hardness	7–7.5	1.00	infobox
Cordierite	Optical properties	Usually optically (-), sometimes (+); 2V = 0–90°	1.00	infobox
Cordierite	Pleochroism	X = pale yellow, green; Y = violet, blue-violet; Z = pale blue	1.00	infobox
Cordierite	Refractive index	nα = 1.527 – 1.560 nβ = 1.532 – 1.574 nγ = 1.538 – 1.578 Indices increase with Fe content.	1.00	infobox
Cordierite	Space group	Cccm	1.00	infobox
Cordierite	Specific gravity	2.57–2.66	1.00	infobox
Cordierite	Streak	White	1.00	infobox
Cordierite	Strunz classification	9.CJ.10	1.00	infobox
Cordierite	Tenacity	Brittle	1.00	infobox
Cordierite	Twinning	Common on {110}, {130}, simple, lamellar, cyclical	1.00	infobox
Cordierite	Unit cell	a = 17.079 Å, b = 9.730 Å, c = 9.356 Å; Z = 4	1.00	infobox

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