|
gptkbp:instanceOf
|
phyllosilicate mineral
|
|
gptkbp:absorption
|
high water absorption
|
|
gptkbp:associatedWith
|
bentonite
|
|
gptkbp:CASNumber
|
1318-93-0
|
|
gptkbp:category
|
clay mineral
|
|
gptkbp:cationExchangeCapacity
|
high
|
|
gptkbp:chemicalFormula
|
(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2·nH2O
|
|
gptkbp:cleavage
|
perfect
|
|
gptkbp:color
|
black
brown
gray
green
red
white
yellow
pink
|
|
gptkbp:crystalSystem
|
monoclinic
|
|
gptkbp:dehydrationTemperature
|
~100°C
|
|
gptkbp:discoveredIn
|
1847
|
|
gptkbp:expansionOnWet
|
expands significantly
|
|
gptkbp:foundIn
|
sedimentary rocks
volcanic ash deposits
|
|
gptkbp:hardnessMohs
|
1-2
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Montmorillonite
|
|
gptkbp:IMAStatus
|
approved mineral
|
|
gptkbp:luster
|
dull
|
|
gptkbp:namedAfter
|
gptkb:Montmorillon
|
|
gptkbp:opticalProperties
|
biaxial (-)
|
|
gptkbp:refractiveIndex
|
1.48–1.52
|
|
gptkbp:relatedGroup
|
smectite group
|
|
gptkbp:relatedTo
|
beidellite
hectorite
nontronite
saponite
|
|
gptkbp:solubility
|
insoluble in water
|
|
gptkbp:specificGravity
|
2-3
|
|
gptkbp:streak
|
white
|
|
gptkbp:structureType
|
2:1 clay
|
|
gptkbp:swellingProperty
|
high
|
|
gptkbp:systematicName
|
Sodium calcium aluminium magnesium silicate hydroxide hydrate
|
|
gptkbp:tenacity
|
gptkb:plastic
|
|
gptkbp:thermalStability
|
low
|
|
gptkbp:transparency
|
translucent to opaque
|
|
gptkbp:uses
|
pharmaceuticals
soil conditioner
drilling mud
cat litter
foundry sand
|
|
gptkbp:bfsParent
|
gptkb:Phyllosilicates
|
|
gptkbp:bfsLayer
|
7
|