Statements (35)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:granite
|
| gptkbp:associatedMinerals |
gptkb:albite
gptkb:riebeckite aegirine nepheline microcline |
| gptkbp:category |
inosilicate
|
| gptkbp:chemicalFormula |
Na3(Fe2+4Fe3+)Si8O22(OH)2
|
| gptkbp:cleavage |
[110] perfect
|
| gptkbp:color |
black
deep green |
| gptkbp:crystalSystem |
monoclinic
|
| gptkbp:discoveredBy |
1823
|
| gptkbp:event |
gptkb:syenites
pegmatites alkaline igneous rocks |
| gptkbp:fracture |
uneven
|
| gptkbp:habit |
fibrous aggregates
prismatic crystals |
| gptkbp:hardnessMohs |
5.5-6
|
| gptkbp:IMA_symbol |
gptkb:Arf
|
| gptkbp:luster |
vitreous
dull |
| gptkbp:namedAfter |
gptkb:Johan_August_Arfvedson
|
| gptkbp:radioactive |
non-radioactive
|
| gptkbp:relatedGroup |
gptkb:amphibole
|
| gptkbp:specificGravity |
3.3-3.5
|
| gptkbp:streak |
gray
|
| gptkbp:symmetry |
C2/m
|
| gptkbp:transparency |
opaque
|
| gptkbp:uses |
collector's mineral
gemstone (rarely) |
| gptkbp:bfsParent |
gptkb:Aegirine
|
| gptkbp:bfsLayer |
8
|
| https://www.w3.org/2000/01/rdf-schema#label |
Arfvedsonite
|