Statements (33)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
granite
|
| gptkbp:alterationProduct |
gptkb:chlorite
|
| gptkbp:associatedMinerals |
gptkb:muscovite
feldspar quartz |
| gptkbp:category |
phyllosilicate
|
| gptkbp:chemicalFormula |
K(Mg,Fe)3AlSi3O10(F,OH)2
|
| gptkbp:cleavage |
perfect basal
|
| gptkbp:color |
black
dark brown |
| gptkbp:crystalSystem |
monoclinic
|
| gptkbp:diaphaneity |
transparent to opaque
|
| gptkbp:discoveredIn |
1847
|
| gptkbp:event |
metamorphic rocks
igneous rocks |
| gptkbp:fracture |
uneven
|
| gptkbp:habit |
tabular crystals
lamellar aggregates |
| gptkbp:hardnessMohs |
2.5–3
|
| https://www.w3.org/2000/01/rdf-schema#label |
biotite
|
| gptkbp:luster |
vitreous
|
| gptkbp:namedAfter |
gptkb:Jean-Baptiste_Biot
|
| gptkbp:radioactive |
may contain trace uranium
|
| gptkbp:relatedGroup |
mica group
|
| gptkbp:specificGravity |
2.7–3.1
|
| gptkbp:streak |
white
|
| gptkbp:tenacity |
elastic
|
| gptkbp:transparency |
transparent to opaque
|
| gptkbp:uses |
insulator
geological indicator |
| gptkbp:bfsParent |
gptkb:Bowen's_reaction_series
gptkb:Almandine |
| gptkbp:bfsLayer |
5
|