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gptkbp:instanceOf
|
Mineral group
|
|
gptkbp:category
|
Inosilicate
|
|
gptkbp:chemicalFormula
|
(Ca,Na)2-3(Mg,Fe,Al)5(Si,Al)8O22(OH)2
|
|
gptkbp:cleavage
|
56° and 124° angles
|
|
gptkbp:color
|
Black
Brown
Colorless
Green
|
|
gptkbp:crystalSystem
|
Monoclinic
Orthorhombic
|
|
gptkbp:differenceFromPyroxene
|
Cleavage angles and double chain structure
|
|
gptkbp:distinctiveFeature
|
Chain silicate structure
Two cleavage directions at 56° and 124°
|
|
gptkbp:event
|
Igneous rocks
Metamorphic rocks
|
|
gptkbp:fracture
|
Uneven
|
|
gptkbp:habit
|
Prismatic crystals
Fibrous aggregates
Columnar aggregates
|
|
gptkbp:hardnessMohs
|
5–6
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Amphibole
|
|
gptkbp:luster
|
Vitreous
Dull
Silky
|
|
gptkbp:mainConstituent
|
gptkb:Oxygen
gptkb:Calcium
gptkb:Hydrogen
Iron
Aluminum
Sodium
Magnesium
Silicon
|
|
gptkbp:namedFor
|
gptkb:René_Just_Haüy
|
|
gptkbp:nameOrigin
|
Greek 'amphibolos' meaning 'ambiguous'
|
|
gptkbp:notableMember
|
gptkb:Hornblende
gptkb:Anthophyllite
gptkb:Actinolite
gptkb:Tremolite
gptkb:Glaucophane
gptkb:Riebeckite
|
|
gptkbp:opticalProperties
|
Biaxial (+/-)
|
|
gptkbp:relatedTo
|
gptkb:Pyroxene
|
|
gptkbp:specificGravity
|
2.9–3.6
|
|
gptkbp:streak
|
White
|
|
gptkbp:transparency
|
Translucent
Opaque
|
|
gptkbp:uses
|
gptkb:Asbestos_(some_varieties)
|
|
gptkbp:bfsParent
|
gptkb:Feldspar
gptkb:Andesite
gptkb:Silicate_minerals
|
|
gptkbp:bfsLayer
|
6
|