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Zoisite

Zoisite, first known as saualpite, after its type locality, is a calcium aluminum hydroxy sorosilicate. Its chemical formula is Ca2Al3(SiO4)(Si2O7)O(OH). It was formerly considered a member of the epidote group.

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Birefringence
0.006–0.018
Category
Sorosilicate
Cleavage
Perfect {010} imperfect {100}
Color
White, gray, greenish brown, greenish gray, pink, blue, purple
Crystal class
Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)
Crystal habit
Prismatic crystals with striations; massive to columnar

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Zoisite

Nodes43
Edges42
Triples40
Avg. degree1.95
Density0.046512
Components1

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Zoisite

Top relations

related to Bibliography · 12
Zoisite → Cornelis, Cornelius, Hurlbut, ISBN, Klein, Manual, Mineralogy, Nickel, On, PDF, Tanzania, The Canadian Mineralogist
related to External links · 5
Zoisite → Cambridge University Press, Chisholm, Encyclopædia Britannica, Hugh, Vol
Birefringence · 1
Zoisite → 0.006–0.018
Category · 1
Zoisite → Sorosilicate
Cleavage · 1
Zoisite → Perfect {010} imperfect {100}
Color · 1
Zoisite → White, gray, greenish brown, greenish gray, pink, blue, purple
Crystal class · 1
Zoisite → Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)
Crystal habit · 1
Zoisite → Prismatic crystals with striations; massive to columnar
Crystal system · 1
Zoisite → Orthorhombic
Dana classification · 1
Zoisite → 58.2.1b.1

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Important terminology

crystals tanzanite thulite mineral ca2al3 sio4 si2o7 oh blue 10 sorosilicate orthorhombic known found parallel principal axis variety zois prismatic

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
ZoisiteBirefringence0.006–0.0181.00infobox
ZoisiteCategorySorosilicate1.00infobox
ZoisiteCleavagePerfect {010} imperfect {100}1.00infobox
ZoisiteColorWhite, gray, greenish brown, greenish gray, pink, blue, purple1.00infobox
ZoisiteCrystal classDipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)1.00infobox
ZoisiteCrystal habitPrismatic crystals with striations; massive to columnar1.00infobox
ZoisiteCrystal systemOrthorhombic1.00infobox
ZoisiteDana classification58.2.1b.11.00infobox
ZoisiteDiaphaneityTransparent to translucent1.00infobox
ZoisiteFormulaCa2Al3(SiO4)(Si2O7)O(OH)1.00infobox
ZoisiteFractureUneven to conchoidal1.00infobox
ZoisiteIMA symbolZo1.00infobox
ZoisiteLusterVitreous, pearly on cleavage surfaces1.00infobox
ZoisiteMohs scale hardness6 to 71.00infobox
ZoisiteOptical propertiesbiaxial positive1.00infobox
ZoisitePleochroismX = pale pink to red-violet; Y = nearly colorless to bright pink or deep blue; Z = pale yellow to yellow-green1.00infobox
ZoisiteRefractive indexnα = 1.696 – 1.700 nβ = 1.696 – 1.702 nγ = 1.702 – 1.7181.00infobox
ZoisiteSpace groupPnma1.00infobox
ZoisiteSpecific gravity3.10–3.361.00infobox
ZoisiteStreakWhite or colorless1.00infobox
ZoisiteStrunz classification9.BG.101.00infobox
ZoisiteTanzaniteGem-quality zoisite, blue-purple1.00infobox
ZoisiteThulitePink1.00infobox

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