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Tusionite

Tusionite is a rare colorless to transparent to translucent yellow brown trigonal borate mineral with chemical formula: MnSn(BO3)2. The mineral is composed of 18.86% manganese, 40.76% tin, 7.42% boron, and 32.96% oxygen. It is a late stage hydrothermal mineral and occurs rarely in granite pegmatites in miarolitic cavities.

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Birefringence
δ = 0.102
Category
Borate minerals
Cleavage
Perfect
Color
Colorless, light yellow to yellow brown
Crystal class
Rhombohedral (3) H-M symbol: (3)
Crystal habit
Thin platy crystals in rosettes

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Tusionite

Nodes20
Edges19
Triples21
Avg. degree1.9
Density0.1
Components1

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Tusionite

Top relations

Birefringence · 1
Tusionite → δ = 0.102
Category · 1
Tusionite → Borate minerals
Cleavage · 1
Tusionite → Perfect
Color · 1
Tusionite → Colorless, light yellow to yellow brown
Crystal class · 1
Tusionite → Rhombohedral (3) H-M symbol: (3)
Crystal habit · 1
Tusionite → Thin platy crystals in rosettes
Crystal system · 1
Tusionite → Trigonal
Density · 1
Tusionite → 4.73
Diaphaneity · 1
Tusionite → Translucent
Formula · 1
Tusionite → MnSn(BO3)2

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Important terminology

mineral formula pegmatites trigonal borate tajikistan also rare colorless translucent yellow brown mnsn bo3 references crystal minerals classification manganese tin

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
TusioniteBirefringenceδ = 0.1021.00infobox
TusioniteCategoryBorate minerals1.00infobox
TusioniteCleavagePerfect1.00infobox
TusioniteColorColorless, light yellow to yellow brown1.00infobox
TusioniteCrystal classRhombohedral (3) H-M symbol: (3)1.00infobox
TusioniteCrystal habitThin platy crystals in rosettes1.00infobox
TusioniteCrystal systemTrigonal1.00infobox
TusioniteDensity4.731.00infobox
TusioniteDiaphaneityTranslucent1.00infobox
TusioniteFormulaMnSn(BO3)21.00infobox
TusioniteFormula mass291.26 gm1.00infobox
TusioniteIMA symbolTsn1.00infobox
TusioniteLusterVitreous1.00infobox
TusioniteMohs scale hardness5–61.00infobox
TusioniteOptical propertiesUniaxial (−)1.00infobox
TusionitePleochroismOrange yellow1.00infobox
TusioniteRefractive indexnω = 1.854 nε = 1.7521.00infobox
TusioniteSpace groupR3 (no. 148)1.00infobox
TusioniteStreakwhite1.00infobox
TusioniteStrunz classification6.AA.151.00infobox
Tusioniteis arare colorless to transparent to translucent yellow brown trigonal borate mineral with chemical formula0.90text

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