|
gptkbp:instanceOf
|
gptkb:granite
|
|
gptkbp:category
|
oxide mineral
|
|
gptkbp:chemicalFormula
|
SiO2
|
|
gptkbp:cleavage
|
none
|
|
gptkbp:color
|
gray
colorless
|
|
gptkbp:crystalSystem
|
tetragonal
|
|
gptkbp:density
|
4.29 g/cm³
|
|
gptkbp:diaphaneity
|
transparent
|
|
gptkbp:discoveredBy
|
gptkb:Sergei_Stishov
|
|
gptkbp:discoveredIn
|
1961
|
|
gptkbp:event
|
impact craters
ultra-high-pressure metamorphic rocks
|
|
gptkbp:foundIn
|
gptkb:Meteor_Crater,_Arizona
Popigai crater, Russia
|
|
gptkbp:fracture
|
conchoidal
|
|
gptkbp:hardnessMohs
|
9.5
|
|
gptkbp:IMA_symbol
|
Stv
|
|
gptkbp:luster
|
vitreous
|
|
gptkbp:namedAfter
|
gptkb:Sergei_Stishov
|
|
gptkbp:polymorphOf
|
gptkb:coesite
quartz
|
|
gptkbp:refractiveIndex
|
1.80
|
|
gptkbp:spaceGroup
|
P4_2/mnm
|
|
gptkbp:specificGravity
|
4.287
|
|
gptkbp:streak
|
white
|
|
gptkbp:symmetry
|
P4_2/mnm
|
|
gptkbp:tenacity
|
brittle
|
|
gptkbp:transparency
|
transparent to translucent
|
|
gptkbp:unitCell
|
a = 4.177 Å, c = 2.665 Å; Z=2
|
|
gptkbp:bfsParent
|
gptkb:silica
gptkb:Silicon_dioxide
gptkb:silicon_dioxide
|
|
gptkbp:bfsLayer
|
6
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
stishovite
|