Chemistry, asked by plutonium3723, 1 year ago

Bravis lattice of individuals atoms in nacl

Answers

Answered by ruhu36
1
NaCl is a crystal structure with a face centered cubic Bravais lattice and two atoms in the basis.

Crystal structure: NaCl
Bravais lattice: face centered cubic
Space group: 225 (F m -3 m),   Strukturbericht: B1,   Pearson symbol: cF8
Point group: m3m (Oh)   six 2-fold rotations, four 3-fold rotations, three 4-fold rotations, nine mirror planes, inversion
Lattice constant: a=0.564a=0.564 nm 
Atomic density natoms=8/a3natoms=8/a3 


The lattice paramters of the conventional unit cell are:

a=b=c,α=90∘,β=90∘,γ=90∘.a=b=c,α=90∘,β=90∘,γ=90∘.

The primitive lattice vectors are,

a⃗ 1=a2x^+a2y^a→1=a2x^+a2y^,   a⃗ 2=a2x^+a2z^a→2=a2x^+a2z^,   a⃗ 3=a2y^+a2z^a→3=a2y^+a2z^.

There are two atoms in the basis. In fractional coordinates of the conventional unit, the positions of the two atoms are,

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