|
gptkbp:instance_of
|
gptkb:Iron_Age
|
|
gptkbp:appearance
|
gptkb:none
|
|
gptkbp:characteristic
|
uniaxial
|
|
gptkbp:chemical_formula
|
(Mg, Fe)2 Al4 Si5 O18
|
|
gptkbp:color
|
gptkb:blue
gptkb:violet
brown
gray
|
|
gptkbp:cooling_system
|
low
|
|
gptkbp:difficulty
|
gptkb:7
|
|
gptkbp:discovery
|
1798
|
|
gptkbp:dissolved
|
insoluble in water
|
|
gptkbp:engine
|
catalysts
substrates for catalytic converters
thermal shock resistant materials
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
cordierite
|
|
gptkbp:is_aligned_with
|
P6/mcc
|
|
gptkbp:is_found_in
|
gptkb:granite
basalt
gneiss
schist
rhyolite
|
|
gptkbp:lens_type
|
nω = 1.54, nε = 1.53
|
|
gptkbp:luster
|
vitreous
|
|
gptkbp:named_after
|
Pierre Cordier
|
|
gptkbp:notable_artifact
|
gptkb:granite
gptkb:Ferengi
biotite
hornblende
muscovite
|
|
gptkbp:occurs_in
|
igneous rocks
metamorphic rocks
|
|
gptkbp:pleochroism
|
weak
|
|
gptkbp:release_region
|
gptkb:Australia
gptkb:Brazil
gptkb:China
gptkb:Finland
gptkb:Germany
gptkb:India
gptkb:Italy
gptkb:Norway
gptkb:South_Africa
gptkb:USA
|
|
gptkbp:structure
|
hexagonal
|
|
gptkbp:surface
|
2.6-2.7
|
|
gptkbp:thermal_expansion
|
low
|
|
gptkbp:unit_cell_dimensions
|
a = 4.8 Å, c = 10.2 Å
|
|
gptkbp:uses
|
gptkb:ceramics
refractories
glass-ceramics
|
|
gptkbp:bfsParent
|
gptkb:natural_Iolite
|
|
gptkbp:bfsLayer
|
7
|