svtcristaux.py

Created by camil-kdr

Created on January 11, 2021

734 Bytes


Une maille est définie par :
- sa forme,
- la nature des entités,
- les positions relatives des entités.

Na=6,02e23 mol
a=2r
M=masse molaire
N=nombre atome par maille
c=compacité
c=(N×Vatome)/Vmaille
c=(N*(4/3)*pi*r^3)/(a^3)
p=masse volumique
p=masseEntités/Vmaille 
p=(Matome*N)/(Na*a^3)

MAILLE CUBIQUE SIMPLE
N=8×(1/8) = 1
((4/3)*pi*r^3)/(a^3)
(Matome)/(Na*a^3)
c=0,52

MAILLE CUBIQUE FACE CENTREES
N=(6*(1/2)=3 + 8×(1/8)=1) = 4
(4*(4/3)*pi*r^3)/(a^3)
(Matome*4)/(Na*a^3)
c=0,74
Un cristal est lassemblage des éléments chimiques
(atomes) dans lespace et selon un ordre.
Cet ordre tend vers un équilibre maximum. 
Il s'agit de matière inerte, de matière minérale, 
et non plus de matière organique.

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