Statements (34)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb: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
|
| 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
|
| https://www.w3.org/2000/01/rdf-schema#label |
plagioclase feldspar
|