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
|