TERMIUM Plus®

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FACIES CRISTALLIN [1 record]

Record 1 2012-03-06

English

Subject field(s)
  • Mineralogy
DEF

The characteristic or typical crystal form, combination of forms, or other shape of a mineral, including irregularities.

CONT

Crystal Habit. The characteristic crystal shape (for example: platy, equant, granular, cubic, stubby, lath shaped, tabular, columnar, pyramidal, prismatic, blade-like, needle-like) of a mineral is its habit.

CONT

Some hematite and martite has a strong euhedral fine grained habit. The equigranular mineral habit in this type of ore usually gives well segregated silica and iron-oxide grains ...

OBS

Examples of crystal or mineral habits are acicular (needlelike), tabular (broad and flat), fibrous (hairlike), or prismatic (elongated in one direction). Aggregates of crystals may possess the following habits: botryoidal (grapelike), dendritic (arborescent), or reniform (kidney-shaped).

OBS

Many minerals may be found in more than one habit ... For example, galena may be found in euhedral crystals or in a massive/granular form, and malachite is usually botryoidal ... but may also be fibrous or stalactitic.

French

Domaine(s)
  • Minéralogie
DEF

Prédominance pour un minéral d'une forme cristallographique.

CONT

Tout minéral est caractérisé par un ou plusieurs «habitus» qui sont les formes les plus couramment rencontrées.

CONT

L'aspect extérieur des minéraux, lorsqu'ils sont normalement développés, est celui de solides géométriques dont l'aspect est caractéristique.

CONT

Certains minéraux présentent un faciès cristallographique, un «habitus» comme disent les minéralogistes anglo-saxons [...] variable suivant les conditions de genèse [...] Sans être un thermomètre géologique rigoureux, cet habitus est donc indicatif des conditions de genèse.

Spanish

Campo(s) temático(s)
  • Mineralogía
DEF

Forma simple o compuesta característica de los cristales de un mineral.

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