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BAAL2SI2O8 [1 record]

Record 1 2016-02-26

English

Subject field(s)
  • Mineralogy
Universal entry(ies)
BaAl2Si2O8
formula, see observation
DEF

An uncommon feldspar mineral, barium aluminosilicate ... that occurs as hard, light-coloured, glassy masses and crystals in association with manganese deposits in contact zones ...

OBS

Chemical formula: BaAl2Si2O8

French

Domaine(s)
  • Minéralogie
Entrée(s) universelle(s)
BaAl2Si2O8
formula, see observation
DEF

Minéral rare du métamorphisme de contact des calcaires et des dolomites [constitué de] silicate de baryum et de calcium, du système cristallin monoclinique [...]

OBS

[...] le «celsian» [...] (très rare) [est] caractérisé par un indice d'autant plus élevé et une masse spécifique d'autant plus forte que le minéral est plus riche en baryum. L'éclat est franchement nacré; [il] atteint 1,59 pour 100 % de Ba [baryum]; [la masse spécifique] passera de 2,54 à 3,38 pour le celsian pur.

OBS

Formule chimique : BaAl2Si2O8

Spanish

Campo(s) temático(s)
  • Mineralogía
Entrada(s) universal(es)
BaAl2Si2O8
formula, see observation
DEF

Aluminosilicato de bario [...]

OBS

[...] mineral incoloro o amarillento que cristaliza en el sistema triclínico.

OBS

Fórmula química: BaAl2Si2O8

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