Statements (35)
Predicate | Object |
---|---|
gptkbp:instanceOf |
granite
|
gptkbp:associatedMinerals |
gptkb:epidote
gptkb:jadeite gptkb:lawsonite gptkb:albite |
gptkbp:birefringence |
0.023
|
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:etymology |
from Greek 'glaukos' (bluish-green) and 'phanos' (appearance)
|
gptkbp:event |
blueschist facies rocks
|
gptkbp:firstDescribed |
1845
|
gptkbp:foundIn |
gptkb:California
gptkb:Greece gptkb:Italy gptkb:Japan gptkb:Norway |
gptkbp:hardnessMohs |
6
|
https://www.w3.org/2000/01/rdf-schema#label |
glaucophane
|
gptkbp:IMA_symbol |
gptkb:Gln
|
gptkbp:luster |
vitreous
|
gptkbp:opticalProperties |
biaxial (-)
|
gptkbp:pleochroism |
strong
|
gptkbp:refractiveIndex |
nα = 1.606–1.637
nβ = 1.615–1.654 nγ = 1.629–1.655 |
gptkbp:specificGravity |
3.0–3.2
|
gptkbp:streak |
gray
|
gptkbp:symmetry |
C2/m
|
gptkbp:bfsParent |
gptkb:amphibole
|
gptkbp:bfsLayer |
6
|