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Ilvaite

Ilvaite is a sorosilicate of iron and calcium with formula: CaFe2+2Fe3+Si2O7O(OH). Both manganese and magnesium substitute in the structure. Ilvaite crystallizes in the monoclinic system in black prismatic crystals and columnar masses. It is black to brownish black to gray and opaque. It has a Mohs hardness of 5.5 to 6 and a specific gravity of 3.8 to…

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Category
Sorosilicates
Crystal class
Prismatic (2/m) (same H-M symbol)
Crystal system
Monoclinic
Formula
Ca(Fe2+)2Fe3+[O|OH|Si2O7]
IMA symbol
Ilv
Mohs scale hardness
5.5–6.0

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Overview

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Ilvaite

Nodes16
Edges15
Triples11
Avg. degree1.88
Density0.125
Components1

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Ilvaite

Top relations

Category · 1
Ilvaite → Sorosilicates
Crystal class · 1
Ilvaite → Prismatic (2/m) (same H-M symbol)
Crystal system · 1
Ilvaite → Monoclinic
Formula · 1
Ilvaite → Ca(Fe2+)2Fe3+[O|OH|Si2O7]
IMA symbol · 1
Ilvaite → Ilv
Mohs scale hardness · 1
Ilvaite → 5.5–6.0
Space group · 1
Ilvaite → P21/a
Specific gravity · 1
Ilvaite → 3.8–4.1
Streak · 1
Ilvaite → black
Strunz classification · 1
Ilvaite → 9.BE.07

Important terminology Word statistics

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Important terminology

black monoclinic occurs formula 2fe3 oh system prismatic mohs hardness specific gravity sorosilicate iron calcium manganese magnesium lawsonite skarn syenites

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
IlvaiteCategorySorosilicates1.00infobox
IlvaiteCrystal classPrismatic (2/m) (same H-M symbol)1.00infobox
IlvaiteCrystal systemMonoclinic1.00infobox
IlvaiteFormulaCa(Fe2+)2Fe3+[O|OH|Si2O7]1.00infobox
IlvaiteIMA symbolIlv1.00infobox
IlvaiteMohs scale hardness5.5–6.01.00infobox
IlvaiteSpace groupP21/a1.00infobox
IlvaiteSpecific gravity3.8–4.11.00infobox
IlvaiteStreakblack1.00infobox
IlvaiteStrunz classification9.BE.071.00infobox
Ilvaiteis asorosilicate of iron and calcium with formula0.90text

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