|
gptkbp:instanceOf
|
granite
|
|
gptkbp:alternativeName
|
KAlSi3O8
K-feldspar
|
|
gptkbp:associatedMinerals
|
gptkb:Plagioclase_feldspar
gptkb:Quartz
gptkb:Biotite
gptkb:Muscovite
|
|
gptkbp:category
|
Tectosilicate
|
|
gptkbp:chemicalFormula
|
KAlSi3O8
|
|
gptkbp:cleavage
|
Perfect
|
|
gptkbp:color
|
gptkb:Cream
Gray
Pink
Red
White
|
|
gptkbp:containsElement
|
gptkb:Oxygen
Aluminum
Potassium
Silicon
|
|
gptkbp:containsMineral
|
gptkb:Feldspar
|
|
gptkbp:crystalSystem
|
Monoclinic
Triclinic
|
|
gptkbp:discoveredBy
|
gptkb:Johann_Friedrich_Christian_Hessel
|
|
gptkbp:event
|
Igneous rocks
Metamorphic rocks
Sedimentary rocks
|
|
gptkbp:fracture
|
Uneven
|
|
gptkbp:grapeVariety
|
gptkb:Microcline
gptkb:Sanidine
gptkb:Orthoclase
|
|
gptkbp:habit
|
Massive
Tabular crystals
|
|
gptkbp:hardnessMohs
|
6
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Potassium feldspar
|
|
gptkbp:IMAStatus
|
Approved mineral
|
|
gptkbp:luster
|
Vitreous
|
|
gptkbp:opticalProperties
|
Biaxial (+/-)
|
|
gptkbp:radioactive
|
May be weakly radioactive due to potassium-40
|
|
gptkbp:refractiveIndex
|
1.518–1.526
|
|
gptkbp:solubility
|
Insoluble in water
|
|
gptkbp:specificGravity
|
2.55–2.63
|
|
gptkbp:streak
|
White
|
|
gptkbp:tenacity
|
Brittle
|
|
gptkbp:transparency
|
Transparent to translucent
|
|
gptkbp:uses
|
Ceramics
Glassmaking
Fillers
Abrasives
|
|
gptkbp:bfsParent
|
gptkb:Orthoclase
|
|
gptkbp:bfsLayer
|
7
|