|
gptkbp:instanceOf
|
granite
|
|
gptkbp:associatedMinerals
|
gptkb:epidote
gptkb:jadeite
gptkb:lawsonite
gptkb:albite
|
|
gptkbp:birefringence
|
0.014–0.021
|
|
gptkbp:category
|
inosilicate
|
|
gptkbp:chemicalFormula
|
Na2(Mg3Al2)Si8O22(OH)2
|
|
gptkbp:cleavage
|
prismatic
|
|
gptkbp:color
|
blue
bluish-gray
|
|
gptkbp:containsMineral
|
gptkb:amphibole
|
|
gptkbp:crystalSystem
|
monoclinic
|
|
gptkbp:Dana_classification
|
66.1.3a.1
|
|
gptkbp:discoveredBy
|
J.D. Dana
|
|
gptkbp:event
|
metamorphic rocks
blueschist
|
|
gptkbp:habit
|
fibrous aggregates
prismatic crystals
|
|
gptkbp:hardnessMohs
|
6
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Glaucophane
|
|
gptkbp:IMA_symbol
|
gptkb:Gln
|
|
gptkbp:luster
|
vitreous
|
|
gptkbp:namedAfter
|
Greek words for 'blue' and 'appearance'
|
|
gptkbp:opticalProperties
|
biaxial (-)
|
|
gptkbp:pleochroism
|
strong
|
|
gptkbp:radioactive
|
non-radioactive
|
|
gptkbp:refractiveIndex
|
nγ = 1.629–1.655
nα = 1.606–1.641
nβ = 1.615–1.653
|
|
gptkbp:specificGravity
|
3.0
|
|
gptkbp:streak
|
gray
|
|
gptkbp:Strunz_classification
|
9.DE.25
|
|
gptkbp:symmetry
|
C2/m
|
|
gptkbp:tenacity
|
brittle
|
|
gptkbp:transparency
|
translucent
|
|
gptkbp:uses
|
petrology indicator
|
|
gptkbp:bfsParent
|
gptkb:Amphibole
|
|
gptkbp:bfsLayer
|
7
|