Statements (32)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
granite
|
| gptkbp:approvedBy |
gptkb:IMA
|
| gptkbp:birefringence |
0.023
|
| gptkbp:category |
sorosilicate
|
| gptkbp:chemicalFormula |
Ca2(Fe3+,Al)Al2(SiO4)(Si2O7)(OH)2·H2O
|
| gptkbp:cleavage |
perfect on {001}
|
| gptkbp:color |
brown
green yellowish green |
| gptkbp:crystalSystem |
monoclinic
|
| gptkbp:discoveredBy |
1988
|
| gptkbp:firstDescribed |
Val d'Ala, Piedmont, Italy
|
| gptkbp:habit |
prismatic crystals
fibrous radiating aggregates |
| gptkbp:hardnessMohs |
5.5
|
| gptkbp:hasSubgroup |
gptkb:pumpellyite_group
|
| https://www.w3.org/2000/01/rdf-schema#label |
pumpellyite-(Fe3+)
|
| gptkbp:IMA_symbol |
Pmp-Fe3+
|
| gptkbp:luster |
vitreous
|
| gptkbp:namedAfter |
gptkb:Raphael_Pumpelly
|
| gptkbp:opticalProperties |
biaxial (+)
|
| gptkbp:pleochroism |
weak
|
| gptkbp:refractiveIndex |
nα = 1.675
nβ = 1.684 nγ = 1.698 |
| gptkbp:specificGravity |
3.3
|
| gptkbp:streak |
pale green
|
| gptkbp:tenacity |
brittle
|
| gptkbp:transparency |
translucent
|
| gptkbp:bfsParent |
gptkb:pumpellyite_group
|
| gptkbp:bfsLayer |
7
|