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Majorite

Majorite is a mineral found in the mantle of the Earth. Its chemical formula is Mg3(MgSi)(SiO4)3. It is a type of garnet, distinguished from other garnets in having silicon in octahedral as well as tetrahedral coordination. Majorite was first described in 1970 from the Coorara Meteorite of Western Australia and has been reported from various other…

Art, In the mantle & Synthetic magnesium endmember majorite

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In the mantle

MantleSolid solutionsAnionOxygenConvection currents
5 related topics

Synthetic magnesium endmember majorite

PolymorphousEnstatiteAkimotoiteTetragonal
4 related topics

Overview

MineralMantleGarnetSiliconCoordination
13 related topics

Key facts & relationships

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Birefringence
slight
Category
Nesosilicates
Cleavage
None
Color
Purple, pale yellowish brown, colorless
Crystal class
Hexoctahedral (m3m) H-M symbol: (4/m 3 2/m)
Crystal habit
Microcrystalline aggregates; acicular to equant grains in narrow veinlets

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Overview

Synthetic magnesium endmember majorite

In the mantle

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Map overview Semantic statistics

Majorite

Nodes26
Edges25
Triples35
Avg. degree1.92
Density0.076923
Components1

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Majorite

Top relations

related to In the mantle · 9
Majorite → Al, All, Ca-bearing, Earth, Earth's, Fe, However, It, Research
related to Synthetic magnesium endmember majorite · 6
Majorite → It, Mg, MgSiO3, Pure, Si, Unlike
is a · 2
Majorite → member of the garnet group, mineral found in the mantle of the Earth
Birefringence · 1
Majorite → slight
Category · 1
Majorite → Nesosilicates
Cleavage · 1
Majorite → None
Color · 1
Majorite → Purple, pale yellowish brown, colorless
Crystal class · 1
Majorite → Hexoctahedral (m3m) H-M symbol: (4/m 3 2/m)
Crystal habit · 1
Majorite → Microcrystalline aggregates; acicular to equant grains in narrow veinlets
Crystal system · 1
Majorite → Cubic

Important terminology Word statistics

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Important terminology

mantle oxygen mineral reported earth garnets pressure pure mgsio3 formula mg3 mgsi sio4 garnet coordination references octahedral tetrahedral high cubic

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
MajoriteBirefringenceslight1.00infobox
MajoriteCategoryNesosilicates1.00infobox
MajoriteCleavageNone1.00infobox
MajoriteColorPurple, pale yellowish brown, colorless1.00infobox
MajoriteCrystal classHexoctahedral (m3m) H-M symbol: (4/m 3 2/m)1.00infobox
MajoriteCrystal habitMicrocrystalline aggregates; acicular to equant grains in narrow veinlets1.00infobox
MajoriteCrystal systemCubic1.00infobox
MajoriteDiaphaneitySemitransparent1.00infobox
MajoriteFormulaMg3(MgSi)(SiO4)31.00infobox
MajoriteIMA symbolMaj1.00infobox
MajoriteLusterVitreous1.00infobox
MajoriteMohs scale hardness7–7.51.00infobox
MajoriteOptical propertiesIsotropic1.00infobox
MajoriteRefractive indexn = 1.87 – 1.92 (calculated)1.00infobox
MajoriteSpace groupIa3d or tetragonal I41/a for pure MgSiO31.00infobox
MajoriteSpecific gravityMeasured at about 4; 3.51 (calculated for pure MgSiO3)1.00infobox
MajoriteStrunz classification9.AD.251.00infobox
MajoriteUnit cella = 11.52 Å; Z = 81.00infobox
Majoriteis amineral found in the mantle of the Earth0.90text
Majoriteis amember of the garnet group0.90text

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