|
gptkbp:instanceOf
|
granite
|
|
gptkbp:associatedMinerals
|
gptkb:biotite
gptkb:muscovite
gptkb:orthoclase
gptkb:hornblende
granite
quartz
|
|
gptkbp:birefringence
|
0.007–0.010
|
|
gptkbp:category
|
feldspar
|
|
gptkbp:chemicalFormula
|
(Na,Ca)(Si,Al)4O8
|
|
gptkbp:cleavage
|
perfect on {001}
|
|
gptkbp:color
|
gray
greenish
reddish
white
yellowish
|
|
gptkbp:crystalSystem
|
triclinic
|
|
gptkbp:event
|
metamorphic rocks
igneous rocks
|
|
gptkbp:fracture
|
uneven
|
|
gptkbp:hardnessMohs
|
6–6.5
|
|
gptkbp:hasVariant
|
gptkb:aventurine_feldspar
sunstone
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Oligoclase
|
|
gptkbp:IMAStatus
|
approved mineral
|
|
gptkbp:location
|
gptkb:Binn_Valley,_Switzerland
|
|
gptkbp:luster
|
vitreous
|
|
gptkbp:namedFor
|
gptkb:August_Breithaupt
|
|
gptkbp:nameOrigin
|
Greek words for 'little' and 'fracture'
|
|
gptkbp:opticalProperties
|
biaxial (+)
|
|
gptkbp:refractiveIndex
|
1.537–1.551
|
|
gptkbp:relatedGroup
|
gptkb:plagioclase_feldspar
|
|
gptkbp:solidSolutionSeries
|
gptkb:albite
anorthite
|
|
gptkbp:specificGravity
|
2.62–2.65
|
|
gptkbp:streak
|
white
|
|
gptkbp:transparency
|
transparent to translucent
|
|
gptkbp:uses
|
granite
industrial mineral
|
|
gptkbp:bfsParent
|
gptkb:Albite
gptkb:Feldspar
|
|
gptkbp:bfsLayer
|
6
|