Statements (33)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
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
|
| https://www.w3.org/2000/01/rdf-schema#label |
stishovite
|
| 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
|
| gptkbp:bfsLayer |
5
|