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KAL3(SO 4)2(OH) [1 record]

Record 1 2010-11-10

English

Subject field(s)
  • Mineralogy
  • Bauxite Mining
Universal entry(ies)
KAl3(SO 4)2(OH)
formula, see observation
DEF

A naturally occurring aluminum sulfate.

OBS

Named by Beudant in 1824 after aluminilite of Delamétherie (1797).

OBS

aluminilite: An old name for alunite.

OBS

Chemical formula: KAl3(SO4)2(OH)

French

Domaine(s)
  • Minéralogie
  • Mines de bauxite
Entrée(s) universelle(s)
KAl3(SO 4)2(OH)
formula, see observation
DEF

Sulfate d'aluminium naturel [...], d'où l'on tire en grande partie l'alun propre au commerce.

CONT

Dans les bauxites de karst, on rencontre parfois des minéraux alumineux de la famille des aluns [...] : le minéral «alunite» [...] est le plus fréquent. Comme la formule l'indique, le minéral peut contenir aussi bien du potassium que du sodium, en proportions respectives variables.

OBS

Sa couleur est blanche, grise ou rougeâtre, sa structure concrétionnée.

OBS

Étymologie : contraction d'aluminilite, première appellation de ce minéral.

OBS

Formule chimique : KAl3(SO4)2(OH)

Spanish

Campo(s) temático(s)
  • Mineralogía
  • Minas de bauxita
Entrada(s) universal(es)
KAl3(SO 4)2(OH)
formula, see observation
DEF

Producto de la descomposición de las rocas traquíticas consistente en sulfato de aluminio.

OBS

Fórmula química: K2SO[subídince 4]3Al2SO46H2O

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