About: Cordierite   Sponge Permalink

An Entity of Type : dbkwik:resource/6IIoeMLPkySiK--1vpcViQ==, within Data Space : 134.155.108.49:8890 associated with source dataset(s)

Cordierite.jpg|thumb|300px|right]] Cordierite (mineralogy) or iolite (gemology) is a magnesium iron aluminium cyclosilicate. Iron is almost always present. Cordierite typically occurs in contact or regional metamorphism of argillaceous rocks. It is especially common in hornfels produced by contact metamorphism of pelitic rocks

AttributesValues
rdf:type
rdfs:label
  • Cordierite
  • Cordierite
rdfs:comment
  • Cordierite (mineralogy) or iolite (gemology) is a magnesium iron aluminium cyclosilicate. Iron is almost always present and a solid solution exists between Mg-rich cordierite and Fe-rich sekaninaite with a series formula: (Mg,Fe)2Al3(Si5AlO18) to (Fe,Mg)2Al3(Si5AlO18). A high temperature polymorph exists, indialite, which is isostructural with beryl and has a random distribution of Al in the (Si,Al)6O18 rings.
  • Cordierite.jpg|thumb|300px|right]] Cordierite (mineralogy) or iolite (gemology) is a magnesium iron aluminium cyclosilicate. Iron is almost always present. Cordierite typically occurs in contact or regional metamorphism of argillaceous rocks. It is especially common in hornfels produced by contact metamorphism of pelitic rocks
sameAs
dcterms:subject
dbkwik:ceramica/pr...iPageUsesTemplate
Category
opticalprop
  • Usually optically , sometimes ; 2V = 0-90°
diaphaniety
  • Transparent to translucent
mohs
  • 7(xsd:integer)
Gravity
  • 257(xsd:integer)
Name
  • Cordierite
symmetry
  • 2(xsd:integer)
Caption
  • Cordierite from Italy
dana
  • 61020101(xsd:integer)
dbkwik:resource/7UNC5-bUvfR5Dxex-m0HXA==
  • Resembles quartz can be distinguished by pleochroism. Can be distinguished from corundum by its lower hardness
streak
  • White
formula
  • 2(xsd:integer)
System
  • Orthorhombic - Dipyramidal Space Group: C ccm
pleochroism
  • X = pale yellow, green; Y = violet, blue-violet; Z = pale blue
strunz
  • 9(xsd:integer)
Color
  • Blue, smoky blue, bluish violet; greenish, yellowish brown, gray; colorless to very pale blue in thin section
fusibility
  • on thin edges
unit cell
  • a = 17.079 Å, b = 9.730 Å, c = 9.356 Å; Z = 4
tenacity
  • Brittle
cleavage
  • Fair on {100}, poor on {001} and {010}
habit
  • Pseudo-hexagonal prismatic twins, as imbedded grains, and massive
twinning
  • Common on {110}, {130}, simple, lamellar, cyclical
fracture
  • Subconchoidal
refractive
  • nα = 1.527 - 1.560 nβ = 1.532 - 1.574 nγ = 1.538 - 1.578 Indices increase with Fe content.
luster
  • Greasy or vitreous
abstract
  • Cordierite (mineralogy) or iolite (gemology) is a magnesium iron aluminium cyclosilicate. Iron is almost always present and a solid solution exists between Mg-rich cordierite and Fe-rich sekaninaite with a series formula: (Mg,Fe)2Al3(Si5AlO18) to (Fe,Mg)2Al3(Si5AlO18). A high temperature polymorph exists, indialite, which is isostructural with beryl and has a random distribution of Al in the (Si,Al)6O18 rings.
  • Cordierite.jpg|thumb|300px|right]] Cordierite (mineralogy) or iolite (gemology) is a magnesium iron aluminium cyclosilicate. Iron is almost always present. Cordierite typically occurs in contact or regional metamorphism of argillaceous rocks. It is especially common in hornfels produced by contact metamorphism of pelitic rocks
Alternative Linked Data Views: ODE     Raw Data in: CXML | CSV | RDF ( N-Triples N3/Turtle JSON XML ) | OData ( Atom JSON ) | Microdata ( JSON HTML) | JSON-LD    About   
This material is Open Knowledge   W3C Semantic Web Technology [RDF Data] Valid XHTML + RDFa
OpenLink Virtuoso version 07.20.3217, on Linux (x86_64-pc-linux-gnu), Standard Edition
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2012 OpenLink Software