TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

MG3B7O13CL [1 record]

Record 1 2012-04-13

English

Subject field(s)
  • Mineralogy
Universal entry(ies)
Mg3B7O13Cl
formula, see observation
DEF

... a glassy borate mineral, magnesium chloroborate [that] has been found as crystals embedded in sedimentary deposits of anhydrite, gypsum, and halite.

CONT

Above 265°C boracite is cubic but below this temperature it is orthorhombic due to differences in the positions of the magnesium and chlorine atoms. This inversion results in the crystals becoming twinned by a rotation of I2O° about.

OBS

Optical Properties: Transparent to translucent. Color: Colorless, white, gray, yellow;bluish green, green to dark green if ferroan; colorless in transmitted light. Streak: White. Luster: Vitreous to adamantine.

OBS

Chemical formula: Mg3B7O13Cl

French

Domaine(s)
  • Minéralogie
Entrée(s) universelle(s)
Mg3B7O13Cl
formula, see observation
DEF

Minéral (borate) du système cristallin orthorhombique, pseudo-cubique, se trouvant en cristaux isolés dans les dépôts sédimentaires d'anhydrite, de gypse ou d'halite et dans les dépôts de potasse de type océanique.

CONT

Pseudo-cubique à la température ordinaire, la boracite devient cubique à 265 °C. [...] Transparente à translucide. Blanchâtre, jaunâtre, vert bleuâtre, vert foncé.

OBS

Formule chimique : Mg3B7O13Cl

Spanish

Campo(s) temático(s)
  • Mineralogía
Entrada(s) universal(es)
Mg3B7O13Cl
formula, see observation
DEF

Cloroborato magnésico [...] cuyos cristales, aunque aparentemente cúbicos, cristalizan en el sistema rómbico; es transparente, a veces incoloro y en otros casos de color azulino o verdoso.

OBS

Fórmula química: Mg3B7O13Cl

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