|
gptkbp:instanceOf
|
Mineral group
|
|
gptkbp:associatedMinerals
|
gptkb:Hornblende
gptkb:Quartz
gptkb:Biotite
|
|
gptkbp:category
|
Tectosilicate
|
|
gptkbp:chemicalFormula
|
(Na,Ca)(Si,Al)4O8
|
|
gptkbp:cleavage
|
Perfect on {001}
|
|
gptkbp:color
|
gray
greenish
white
bluish
|
|
gptkbp:commonIn
|
gptkb:Diorite
gptkb:Anorthosite
gptkb:Gabbro
Granite
Basalt
|
|
gptkbp:crystalSystem
|
Triclinic
|
|
gptkbp:discoveredBy
|
gptkb:Johann_Friedrich_Christian_Hessel
|
|
gptkbp:discoveredIn
|
1826
|
|
gptkbp:event
|
Igneous rocks
Metamorphic rocks
Sedimentary rocks
|
|
gptkbp:fracture
|
Uneven
|
|
gptkbp:hardnessMohs
|
6–6.5
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Plagioclase Feldspar
|
|
gptkbp:luminosity
|
nan
|
|
gptkbp:luster
|
Vitreous
|
|
gptkbp:magnetType
|
Non-magnetic
|
|
gptkbp:mineralSeries
|
gptkb:Anorthite
gptkb:Oligoclase
gptkb:Albite
gptkb:Andesine
gptkb:Bytownite
gptkb:Labradorite
|
|
gptkbp:namedAfter
|
Greek words for 'oblique' and 'fracture'
|
|
gptkbp:opticalProperties
|
Biaxial (-)
|
|
gptkbp:radioactive
|
Non-radioactive
|
|
gptkbp:refractiveIndex
|
1.53–1.58
|
|
gptkbp:solubility
|
Insoluble in water
|
|
gptkbp:specificGravity
|
2.62–2.76
|
|
gptkbp:streak
|
White
|
|
gptkbp:subclassOf
|
gptkb:Feldspar
|
|
gptkbp:twinningLaw
|
Albite law
Pericline law
|
|
gptkbp:twins
|
gptkb:Common
|
|
gptkbp:uses
|
Ceramics
Glassmaking
Abrasives
|
|
gptkbp:bfsParent
|
gptkb:Alkali_Feldspar_Granite
|
|
gptkbp:bfsLayer
|
7
|