Architecture De La Matiere 2 Flashcards

Cristallographie

1
Q

Nombre doublets de l’atome central: 2

A

Nombre de liais.: 2
Gillespie: AX2
forme: Linéaire

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2
Q

Nombre doublets de l’atome central: 4

A

Nombre de liais.: 4 ou 3 ou 2
Gillespie: AX4 ou AX3E1 ou AX2E2
forme: Tétraèdre/pyramidale/coudée

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3
Q

Nombre doublets de l’atome central: 3

A

Nombre de liais.: 3 ou 2
Gillespie: AX3 ou AX2E1
forme: Triangle ou coudée

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4
Q

Nombre doublets de l’atome central: 6

A

Nombre de liais.: 6
Gillespie: AX6
forme: Octaèdre

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5
Q

Nombre doublets de l’atome central: 5

A

Nombre de liais.: 5
Gillespie: AX5
forme: Bipyramidale

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6
Q

Hexagonale compacte

A
AB Coordinence: 12
R=a/2 b=a√(3)/2 c=2h=2a√(2/3)
V=a.b.c=a^3√(2)
Population: 2 atomes/maille
Compacité: π/3√(2)=0.74
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7
Q

Sites octaédriques

A

Motif au centre de la maille
4 sites octaédriques
r/R=√(2)-1

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8
Q

Sites tétraèdriques

A

Motif au centre d’un des 8 petits cubes
8 sites tétraèdriques
r/R=√(3/2)-1

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9
Q

Cubique face centrée

A

ABC Coordinence: 12
R=a/2√(2)
Population: 4 atomes/maille
Compacité: π/3√(2)=0.74

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