|
gptkbp:instanceOf
|
granite
|
|
gptkbp:alsoKnownAs
|
gptkb:Titanite
|
|
gptkbp:birefringence
|
0.105–0.135
|
|
gptkbp:chemicalFormula
|
CaTiSiO5
|
|
gptkbp:cleavage
|
Distinct
|
|
gptkbp:color
|
Black
Brown
Gray
Green
Red
Yellow
|
|
gptkbp:containsElement
|
gptkb:Oxygen
gptkb:Calcium
Titanium
Silicon
|
|
gptkbp:crystalSystem
|
Monoclinic
|
|
gptkbp:discoveredIn
|
1795
|
|
gptkbp:event
|
Igneous rocks
Metamorphic rocks
|
|
gptkbp:fracture
|
Uneven
|
|
gptkbp:hardnessMohs
|
5 to 5.5
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Sphene
|
|
gptkbp:luster
|
Resinous
Adamantine
Submetallic
|
|
gptkbp:namedFor
|
gptkb:Martin_Heinrich_Klaproth
|
|
gptkbp:nameOrigin
|
Greek 'sphenos' meaning wedge
|
|
gptkbp:notablePlace
|
gptkb:Austria
gptkb:Brazil
gptkb:Madagascar
gptkb:Pakistan
gptkb:Russia
gptkb:Switzerland
gptkb:United_States
|
|
gptkbp:pleochroism
|
Strong
|
|
gptkbp:radioactive
|
May be weakly radioactive due to thorium substitution
|
|
gptkbp:refractiveIndex
|
1.843–2.110
|
|
gptkbp:relatedGroup
|
Nesosilicate
|
|
gptkbp:specificGravity
|
3.48–3.60
|
|
gptkbp:transparency
|
Translucent
Transparent
|
|
gptkbp:uses
|
granite
|
|
gptkbp:bfsParent
|
gptkb:Precious_Stone
|
|
gptkbp:bfsLayer
|
6
|