Statements (30)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
granite
|
| gptkbp:associatedMinerals |
gptkb:braunite
gptkb:hausmannite gptkb:pyrolusite magnetite hematite |
| gptkbp:category |
oxide mineral
|
| gptkbp:chemicalFormula |
MnFe2O4
|
| gptkbp:cleavage |
none
|
| gptkbp:color |
black
|
| gptkbp:crystalSystem |
isometric
|
| gptkbp:crystalType |
hexoctahedral
|
| gptkbp:Dana_classification |
4.3.5.1
|
| gptkbp:discoveredIn |
gptkb:Jakobsberg_Mine,_Nordmark,_Sweden
1869 |
| gptkbp:fracture |
uneven
|
| gptkbp:hardnessMohs |
5.5
|
| https://www.w3.org/2000/01/rdf-schema#label |
jacobsite
|
| gptkbp:IMA_symbol |
Jcb
|
| gptkbp:luster |
metallic
|
| gptkbp:magnetType |
weakly magnetic
|
| gptkbp:namedAfter |
gptkb:Jakobsberg_Mine
|
| gptkbp:relatedGroup |
spinel group
|
| gptkbp:specificGravity |
4.76–4.80
|
| gptkbp:streak |
brownish-black
|
| gptkbp:Strunz_classification |
4.BB.05
|
| gptkbp:transparency |
opaque
|
| gptkbp:uses |
manganese ore
|
| gptkbp:bfsParent |
gptkb:Magnetite_group
|
| gptkbp:bfsLayer |
5
|