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AL2O3 [1 record]

Record 1 2011-06-03

English

Subject field(s)
  • Mineralogy
Universal entry(ies)
Al2O3
formula, see observation
1302-74-5
CAS number
DEF

An extremely hard rhombohedral mineral which consists of a natural aluminum oxide occurring as variously colored crystals or as shapeless grains and masses.

OBS

[Corundum is] used as an abrasive.

OBS

corundum: Named from the Sanskrit word for this mineral "kauruntaka."

OBS

Chemical formula: Al2O3

French

Domaine(s)
  • Minéralogie
Entrée(s) universelle(s)
Al2O3
formula, see observation
1302-74-5
CAS number
DEF

Variété extrêmement dure d'alumine du groupe des hématites.

CONT

Le corindon, ou oxyde d'alumine [...] est utilisé comme abrasif et dans ses variétés les plus nobles, comme gemme. Selon la couleur bleue ou rouge, il est appelé saphir ou rubis. [...] Les premiers pays producteurs de corindon abrasif sont l'Afrique du sud et la Grèce. Le rubis et le saphir proviennent essentiellement de Birmanie, Thaïlande, Ceylan [...] Du point de vue géochimique, le corindon est considéré comme un minéral de haute température, dans des roches cristallines riches en alumine et pauvres en silice; [...]

OBS

Formule chimique : Al2O3

Spanish

Campo(s) temático(s)
  • Mineralogía
Entrada(s) universal(es)
Al2O3
formula, see observation
1302-74-5
CAS number
DEF

Alúmina [...] que cristaliza en el sistema romboédrico.

CONT

El corindón es generalmente transparente o traslúcido, con aspecto vítreo. Es el más duro de todos los minerales después del diamante.

OBS

Fórmula química: Al2O3.

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