plagioclase feldspar

GPTKB entity

Statements (34)
Predicate Object
gptkbp:instanceOf mineral group
gptkbp:chemicalFormula (Na,Ca)(Si,Al)4O8
gptkbp:cleavage perfect on {001}
gptkbp:color gray
white
bluish
gptkbp:component metamorphic rocks
igneous rocks
gptkbp:crystalSystem triclinic
gptkbp:density 2.62–2.76 g/cm³
gptkbp:discoveredBy gptkb:Johann_Friedrich_Christian_Hessel
gptkbp:event Earth's crust
meteorites
lunar rocks
gptkbp:fracture uneven
gptkbp:hardnessMohs 6–6.5
https://www.w3.org/2000/01/rdf-schema#label plagioclase feldspar
gptkbp:luster vitreous
gptkbp:member gptkb:oligoclase
gptkb:albite
anorthite
andesine
bytownite
labradorite
gptkbp:opticalProperties biaxial (-)
gptkbp:series gptkb:albite-anorthite_series
gptkbp:streak white
gptkbp:subclassOf feldspar
gptkbp:tenacity brittle
gptkbp:uses gptkb:ceramics
glassmaking
geological indicator
gptkbp:bfsParent gptkb:Bowen's_reaction_series
gptkbp:bfsLayer 5