Statements (31)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
granite
|
| gptkbp:asbestosType |
gptkb:Crocidolite
|
| gptkbp:birefringence |
0.020
|
| gptkbp:category |
gptkb:Amphibole
|
| gptkbp:chemicalFormula |
Na2(Fe2+3Fe3+2)Si8O22(OH)2
|
| gptkbp:cleavage |
Good
|
| gptkbp:color |
Black
Blue |
| gptkbp:crystalSystem |
Monoclinic
|
| gptkbp:discoveredIn |
1888
|
| gptkbp:event |
Igneous rocks
Metamorphic rocks |
| gptkbp:fracture |
Splintery
|
| gptkbp:hardnessMohs |
5.5–6
|
| https://www.w3.org/2000/01/rdf-schema#label |
Riebeckite
|
| gptkbp:IMA_approved |
Yes
|
| gptkbp:IMA_symbol |
Rbk
|
| gptkbp:luster |
Vitreous
|
| gptkbp:namedAfter |
gptkb:Emil_Riebeck
|
| gptkbp:opticalProperties |
Biaxial (-)
|
| gptkbp:pleochroism |
Strong
|
| gptkbp:radioactive |
Non-radioactive
|
| gptkbp:refractiveIndex |
nα = 1.680–1.698
nβ = 1.683–1.700 nγ = 1.700–1.718 |
| gptkbp:riskFactor |
Asbestos-related health risk
|
| gptkbp:specificGravity |
3.0–3.4
|
| gptkbp:streak |
Pale blue-gray
|
| gptkbp:symmetry |
C2/m
|
| gptkbp:bfsParent |
gptkb:Amphibole
|
| gptkbp:bfsLayer |
7
|