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The structure of NaCl is given. Determine its lattice constant, a, and its density. Hint: since NaCl is ionic use the ion radius data and the atomic radii.
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Determine the ion radii of Na+ and Cl- ions. The ionic radius of Na+ is 0.95 Å (angstroms). The ionic radius of Cl- is 1.81 Å (angstroms). Show more…
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The crystal structure of sodium chloride $(\mathrm{NaCl})$ is a simple cubic with the $\mathrm{Na}$ and $\mathrm{Cl}$ atoms alternating positions. Each Na atom is then surrounded by six $\mathrm{Cl}$ atoms and likewise each $\mathrm{Cl}$ atom is surrounded by six Na atoms. ( $a$ ) Sketch the atoms in a (100) plane. ( $b$ ) Assume the atoms are hard spheres with nearest neighbors touching. The effective radius of Na is $1.0 \AA$ and the effective radius of $\mathrm{Cl}$ is $1.8 \AA$ A. Determine the lattice constant. (c) Calculate the volume density of Na and Cl atoms. (d) Calculate the mass density of $\mathrm{NaCl}$.
Determine the lattice constant of $\mathrm{NaCl}$ crystal. The molecular weight of $\mathrm{NaCl}$ is $58.44$ and the density is $2.167 \mathrm{~g} \mathrm{~cm}^{-3}$.
Sodium chloride (NaCl) has the rock salt crystal structure and a density of 2.17 g/cm3. The atomic weights of sodium and chlorine are 22.99 g/mol and 35.45 g/mol, respectively. (i) Determine the unit cell edge length. (ii) Determine the unit cell edge length from the radii in the table below assuming that the Na+ and Cl- ions just touch each other along the edges. Cation Ionic Radius (nm) Anion Ionic Radius (nm) Mg2+ 0.072 Cl- 0.181 Fe2+ 0.077 O2- 0.140 Na+ 0.102
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