a-corundum Mineral Data, minerology database

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

Mineral	a-Corundum
Synonym	Corundum

Corundum (synonym)

Mineral	Corundum
Chemistry	Al 2 O 3
Color	Colourlessblue red pink Yellow grey
Luster	Vitreous
CrystalSystem	Trigonal
Cleavage	None Observed
Hardness	9
SpecificGravity	4.01 g/ccm
Streak	White
Occurences	Silica-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.
IMAStatus	Approved
CellParameters	a = 4.751c = 12.97
Ratio	a:c = 1 : 2.73
OpticalType	Uniaxial (-)
RI	n ω =1.768 - 1.772 n ε =1.760 - 1.76
Birefringence	δ=0.008 - 0.009
SurfaceRelief	High
Synonyms	Alumina Corundum Adamas siderites Ajatit Alumina Ayatit Ayatita Ayatite Corindon Corindone Corinendum Corinindum Corivendum Corivindum Corrindon Corundit Corundita Corundite Corundum; Corundum-alpha Corundumit Corundumita Co
Strunz	4/C.04-10 4 : Oxides & Hydroxides C : Oxides with metal : oxygen = 2:3 (M2O3 and related compounds) 04 : Hematite group