|
gptkbp:instanceOf
|
granite
|
|
gptkbp:associatedMinerals
|
gptkb:biotite
gptkb:muscovite
quartz
|
|
gptkbp:birefringence
|
0.005–0.008
|
|
gptkbp:category
|
feldspar
|
|
gptkbp:chemicalFormula
|
KAlSi3O8
|
|
gptkbp:cleavage
|
perfect
|
|
gptkbp:color
|
gptkb:butter
gray
white
pink
|
|
gptkbp:crystalHabit
|
prismatic crystals
massive
tabular crystals
|
|
gptkbp:crystalSystem
|
monoclinic
|
|
gptkbp:Dana_classification
|
6.2.1.1
|
|
gptkbp:discoveredBy
|
gptkb:Johann_Friedrich_Christian_Hessel
|
|
gptkbp:event
|
granite
igneous rocks
|
|
gptkbp:fracture
|
uneven
|
|
gptkbp:gemVariety
|
moonstone
|
|
gptkbp:hardnessMohs
|
6
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
orthoclase
|
|
gptkbp:IMAStatus
|
approved mineral
|
|
gptkbp:IMAYear
|
1801
|
|
gptkbp:luster
|
vitreous
|
|
gptkbp:namedAfter
|
Greek for 'straight fracture'
|
|
gptkbp:polymorph
|
gptkb:adularia
microcline
sanidine
|
|
gptkbp:radioactive
|
may be slightly radioactive due to potassium
|
|
gptkbp:refractiveIndex
|
1.518–1.526
|
|
gptkbp:relatedGroup
|
alkali feldspar
|
|
gptkbp:solubility
|
insoluble in water
|
|
gptkbp:specificGravity
|
2.55–2.63
|
|
gptkbp:streak
|
white
|
|
gptkbp:Strunz_classification
|
9.FA.30
|
|
gptkbp:symmetry
|
C2/m
|
|
gptkbp:tenacity
|
brittle
|
|
gptkbp:transparency
|
translucent
transparent
|
|
gptkbp:uses
|
gptkb:ceramics
granite
glassmaking
|
|
gptkbp:bfsParent
|
gptkb:potassium_feldspar
gptkb:Moonstone
gptkb:Winter_Egg
|
|
gptkbp:bfsLayer
|
6
|