|
gptkbp:instanceOf
|
granite
|
|
gptkbp:associatedMinerals
|
gptkb:biotite
feldspar
quartz
tourmaline
|
|
gptkbp:birefringence
|
δ = 0.035–0.040
|
|
gptkbp:category
|
phyllosilicate
|
|
gptkbp:chemicalFormula
|
KAl2(AlSi3O10)(OH)2
|
|
gptkbp:cleavage
|
perfect
|
|
gptkbp:color
|
brown
gray
green
colorless
|
|
gptkbp:crystalSystem
|
monoclinic
|
|
gptkbp:diaphaneity
|
transparent
|
|
gptkbp:event
|
metamorphic rocks
pegmatites
igneous rocks
|
|
gptkbp:fracture
|
uneven
|
|
gptkbp:habit
|
tabular crystals
lamellar aggregates
|
|
gptkbp:hardnessMohs
|
2–2.5
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
muscovite
|
|
gptkbp:luster
|
vitreous
|
|
gptkbp:meltingPoint
|
1320°C
|
|
gptkbp:namedAfter
|
gptkb:Muscovy
|
|
gptkbp:opticalProperties
|
biaxial (+)
|
|
gptkbp:otherName
|
common mica
potash mica
|
|
gptkbp:pleochroism
|
none
|
|
gptkbp:radioactive
|
non-radioactive
|
|
gptkbp:refractiveIndex
|
nα = 1.552–1.576
nβ = 1.582–1.617
nγ = 1.587–1.618
|
|
gptkbp:relatedGroup
|
mica group
|
|
gptkbp:solubility
|
insoluble in water
|
|
gptkbp:specificGravity
|
2.76–3.0
|
|
gptkbp:streak
|
white
|
|
gptkbp:tenacity
|
elastic
|
|
gptkbp:transparency
|
transparent
|
|
gptkbp:uses
|
moisturizer
electrical insulator
paint filler
|
|
gptkbp:bfsParent
|
gptkb:Bowen's_reaction_series
gptkb:Almandine
|
|
gptkbp:bfsLayer
|
5
|