svt_cristaux.py

Created by juliettebrouste

Created on January 12, 2023

886 Bytes


roche>minéral>cristal>maille
>atome

structure cristalline = 
entites chimiques qui s'agencent 
de manière ordonnée et reguliere

structure amorphe = 
entites chimiques qui ne presente
aucune oraginsation particuliere

maille = forme geo qui se repete
de maniere reguliere dans un
cristal

cristaux gros = phenocristaux

petits cristaux = microcristaux

tout est crystallise = texture
grenue

tout n est pas crystallise =
texture microlithique

la vitesse de refoidissemnt 
du magma influence fromation
crizatix : 
  - rapide = cristialisation
  partielle= microcristaux =
  verre = basalte
  
  - lente = cristialisation
  totale= phenocristaux =
  granite
  
contrairemetn matiere inerte, 
molecule organique froment des 
chaines carbonnees :
  glucide : C H O
  lipide : CHO avec O debut 
  prot CHON parfois S
  
biomineral mineral forme
par etre vivant 




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