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POLYLITHIONITE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2024-02-22

English

Subject field(s)
  • Mineralogy
DEF

Applied to an igneous rock mineral which is completely bounded by its characteristic crystal faces.

CONT

Euhedral biotite, crustal, polylithionite.

OBS

Contrasted with "allotriomorphic," "xenomorphic," and "anhedral."

OBS

idiomorphic: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Minéralogie
DEF

Se dit des minéraux des roches limités par les formes cristallines propres à leur espèce.

CONT

Lorsque les cristaux sont bien individualisés, le minéral est dit automorphe; dans le cas contraire (pas de forme propre), le minéral est dit xénomorphe.

CONT

Un cristal automorphe - on dit aussi idiomorphe (avec ses formes propres) est en principe antérieur à ceux, xénomorphes - on dit aussi allotriomorphes (à formes «étrangères») qui l'enveloppent, à condition qu'il ne s'agisse pas d'une exsolution.

OBS

idiomorphe : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

PHR

Biotite euédrique.

PHR

Cristal automorphe.

Spanish

Campo(s) temático(s)
  • Mineralogía
DEF

Dícese de los cristales que en el seno de una roca cristalina se hallan completamente formados, con todas sus caras.

Save record 1

Record 2 2012-04-20

English

Subject field(s)
  • Mineralogy
Universal entry(ies)
KLi2AlSi4O10(OH,F)2
formula, see observation
KLi2AlSi4O10(F,OH)2
formula, see observation
CONT

Polylithionite occurs at Mont Saint-Hilaire as superb pseudo-hexagonal crystals forming very attractive rosettes. Tainiolite is another closely related mica-group species ressembling polylithionite, however it [is not fluorescent].

OBS

Colour is colourless, white, bluish, greenish, yellow, brown, pink, silvery to pearly white. ... Specimens are fluorescent lemon yellow under shortwave UV [ultraviolet] light.

OBS

Chemical formulas: KLi2AlSi4O10(OH,F)2 or KLi2AlSi4O10(F,OH)2

French

Domaine(s)
  • Minéralogie
Entrée(s) universelle(s)
KLi2AlSi4O10(OH,F)2
formula, see observation
KLi2AlSi4O10(F,OH)2
formula, see observation
DEF

Minéral (silicate) du système cristallin monoclinique, du groupe des micas, se présentant en cristaux tabulaires hexaédriques ou en masses polycristallines, blanc, rosé, parfois verdâtre ou bleuâtre, transparent, trouvé dans des syénites, entre autres, au Mont Saint-Hilaire (Québec).

OBS

«Paucilithionite», «polylithionite» et «protolithionite» sont des variétés de lépidolite correspondant à des compositions chimiques bien déterminées.

OBS

Formules chimiques : KLi2AlSi4O10(OH,F)2 ou KLi2AlSi4O10(F,OH)2

Spanish

Save record 2

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