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gptkbp:instanceOf
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Mineral group
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gptkbp:abundance
|
Most abundant mineral group in Earth's crust
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gptkbp:associatedMinerals
|
gptkb:Quartz
gptkb:Amphibole
gptkb:Mica
gptkb:Pyroxene
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gptkbp:category
|
Tectosilicate
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gptkbp:chemicalFormula
|
(K,Na,Ca)(Al,Si)4O8
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gptkbp:cleavage
|
Perfect
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gptkbp:color
|
Brown
Gray
Pink
White
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gptkbp:crystalSystem
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Monoclinic
Triclinic
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gptkbp:discoveredBy
|
unknown
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gptkbp:event
|
Igneous rocks
Metamorphic rocks
Sedimentary rocks
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gptkbp:fracture
|
Uneven
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gptkbp:hardnessMohs
|
6–6.5
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|
https://www.w3.org/2000/01/rdf-schema#label
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Feldspar
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gptkbp:luster
|
Vitreous
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gptkbp:mainConstituent
|
gptkb:Oxygen
gptkb:Calcium
Aluminium
Potassium
Sodium
Silicon
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gptkbp:nameOrigin
|
German Feld (field) + Spath (a rock that does not contain ore)
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gptkbp:notableMembers
|
gptkb:Anorthite
gptkb:Microcline
gptkb:Oligoclase
gptkb:Albite
gptkb:Andesine
gptkb:Bytownite
gptkb:Sanidine
gptkb:Labradorite
gptkb:Orthoclase
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gptkbp:opticalProperties
|
Biaxial
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gptkbp:solubility
|
Insoluble in water
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gptkbp:specificGravity
|
2.55–2.76
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gptkbp:streak
|
White
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gptkbp:type
|
gptkb:Alkali_feldspar
Plagioclase
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gptkbp:uses
|
Ceramics
Glassmaking
Fillers
|
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gptkbp:weatheringProduct
|
Clay minerals
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gptkbp:bfsParent
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gptkb:Muscovite
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gptkbp:bfsLayer
|
5
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