Question

Does nacl and kcl have same crystal lattice structure

Answer 1

Nacl has high lattice energy of 788 KJ/mol whereas kcl has 699 KJ/mol.

No they don't have same crystal lattice structure.

Answer 2

NaCl has a cubic unit cell. It is best thought of as a face-centered cubic array of anions with an interpenetrating fcc cation lattice (or vice-versa). The cell looks the same whether you start with anions or cations on the corners. Each ion is 6-coordinate and has a local octahedral geometry.

Isostructural Compounds: MgO, TiO, TiC, LaN, NaI; KCl, RbF, AgCl, SrS

Cell Parameters: a = 5.6402 Å, Z=4

Lattice Type: Face-Centered

Cystal System: Cubic

NaCl has a cubic unit cell. It is best thought of as a face-centered cubic array of anions with an interpenetrating fcc cation lattice (or vice-versa). The cell looks the same whether you start with anions or cations on the corners. Each ion is 6-coordinate and has a local octahedral geometry.

Isostructural Compounds: MgO, TiO, TiC, LaN, NaI; KCl, RbF, AgCl, SrS

Cell Parameters: a = 5.6402 Å, Z=4

Lattice Type: Face-Centered

Cystal System: Cubic