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Mineral Reference Lookup for a-corundum

This reference page contains mineralogic data for a-corundum and folklore and metaphysical beliefs. If the mineral is an alternate naming of a more common name, the more common mineral's data is displayed below the list of synonyms.


Minerals matching a-corundum in the database: a-Corundum  

Mineralogical Reference

a-corundum
Minerala-Corundum
SynonymCorundum

Corundum (synonym)

MineralCorundum
ChemistryAl 2 O 3
ColorColourlessblue red pink Yellow grey
LusterVitreous
CrystalSystemTrigonal
CleavageNone Observed
Hardness9
SpecificGravity4.01 g/ccm
StreakWhite
OccurencesSilica-poor rockssuch as Nephelene-Syenitesalkali igneous undersaturated rockscontact aureoles in altered aluminous shalesaluminous xenoliths in high temperature plutonic and hypabyssal rocksmetamorphosed bauxite depositsand as a detrital material in sediments.
IMAStatusApproved
CellParametersa = 4.751c = 12.97
Ratioa:c = 1 : 2.73
OpticalTypeUniaxial (-)
RIn ω =1.768 - 1.772 n ε =1.760 - 1.76
Birefringenceδ=0.008 - 0.009
SurfaceReliefHigh
SynonymsAlumina Corundum Adamas siderites Ajatit Alumina Ayatit Ayatita Ayatite Corindon Corindone Corinendum Corinindum Corivendum Corivindum Corrindon Corundit Corundita Corundite Corundum; Corundum-alpha Corundumit Corundumita Co
Strunz4/C.04-10 4 : Oxides & Hydroxides C : Oxides with metal : oxygen = 2:3 (M2O3 and related compounds) 04 : Hematite group
DANPND_046
QZCLTUM_164
QZGEO_114
JSLEOBD_177
TEBD_070
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