Question

In: Other

The structure of NaCl is given. Determine its lattice constant, a, and its density. Hint: since...

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.

Solutions

Expert Solution

NaCl has FCC structure.

Lattice constant, a can be calculated using ionic radii of Na+ and Cl-.

Ionic radius of Na+ is 1.02 and radius of Cl- is 1.81

Thus, a=(2*radius of Na+)+(2*radius of Cl-)

a=(2*1.02)+(2*1.81)

Lattice constant,a=5.66=5.66*10-8cm

Density for FCC is given by

where n is the number of atoms per unit cell=4 (For FCC, n=4)

M is the molecular mass of NaCl=58.44 g/mol

NA is Avogardo's Number= 6.022*1023 atoms/mole

Amanda K answered 2 years ago
Next > < Previous

Related Solutions

KBr crystallizes in a NaCl (B1) structure with a lattice constant of a=0.65966nm. Determine the bulk...
KBr crystallizes in a NaCl (B1) structure with a lattice constant of a=0.65966nm. Determine the bulk density of KBr and the distance between a K ion and a touching Br ion in the structure. Rationalize your result with the sum of ionic radii for K and Br
Sodium crystallizes in the bcc structure with the lattice constant a=4.23 Å. a. Calculate the carrier...
Sodium crystallizes in the bcc structure with the lattice constant a=4.23 Å. a. Calculate the carrier concentration of Na and give the result in units of cm-3 . b. Calculate the Fermi wave length and give the Fermi energy in eV.
Sodium fluoride adopts the NaCl (FCC) structure type. Estimate the lattice energy, ΔU, for NaF using...
Sodium fluoride adopts the NaCl (FCC) structure type. Estimate the lattice energy, ΔU, for NaF using the Born–Lande equation. The bond length for Na–F is 235 pm, and the Madelung constant is 1.7476. The Born exponent of both the cation and the anion is 7.
A. Determine the linear density for BCC lithium, which has a lattice parameter of 0.35089 nm,...
A. Determine the linear density for BCC lithium, which has a lattice parameter of 0.35089 nm, in the [100], [110], and [111] directions. Which of these directions is close packed? B. Determine the planar density and packing fraction for BCC lithium in the (100), (110), and (111) planes. Which, if any, of these planes is close packed? C. A diffracted x-ray beam is observed from the (220) planes of iron at a 2θ angle of 99.1o when x-rays of 0.15418...
Silicon has a diamond crystal structure with lattice constant of a= 0.543 nm and molar mass...
Silicon has a diamond crystal structure with lattice constant of a= 0.543 nm and molar mass of 28.08 g/mole. (12 points) a) Explain in brief the position of silicon atoms in the unit cell and deduce the corresponding Bravais lattice and state the equivalent positions b) Calculate the density of silicon in g/cm3. c) Calculate the number of silicon atoms per square centimeter (# Si atoms/cm2) on the (100) and (111) faces
The total current density in a semiconductor is given as constant and Jtop = -20 A...
The total current density in a semiconductor is given as constant and Jtop = -20 A / cm ^ 2. Total current density is the sum of the hole drift current density and the electron diffusion current densities. The hole density in the crystal is constant and p = 0.64 * 10 ^ 10 cm ^ -3. Electron density (to be written in x distance micrometer) is given as n (x) = 2 * 10 ^ 15 * e ^...
The total current density in a semiconductor is given as constant and Jtop = -20 A...
The total current density in a semiconductor is given as constant and Jtop = -20 A / cm ^ 2. Total current density is the sum of the hole drift current density and the electron diffusion current densities. The hole density in the crystal is constant and p = 0.64 * 10 ^ 10 cm ^ -3. Electron density (to be written in x distance micrometer) is given as n (x) = 2 * 10 ^ 15 * e ^...
lithium fluoride (LiF) has a density of 2.635 g/cm^3 and the same crystal structure as NaCl....
lithium fluoride (LiF) has a density of 2.635 g/cm^3 and the same crystal structure as NaCl. Lithium has a mass of 6.941 amu and Fluorine has a mass of 18.9984903 amu. amu means atomic mass unit which is 1.66x10^-27 kg. > what is the average spacing between adjacent atoms in LiF crystal?
1. Magnesium oxide has a sodium chloride crystal structure. Determine the lattice parameter for sodium chloride...
1. Magnesium oxide has a sodium chloride crystal structure. Determine the lattice parameter for sodium chloride and magnesium oxide 2.Calculate the theoretical volume change accompanying a polymorphic transformation in a pure metal from the FCC to BCC crystal structure.
Find the center of mass of a thin plate of constant density delta covering the given...
Find the center of mass of a thin plate of constant density delta covering the given region. The region bounded by the parabola x= 6y^2 -3y and the line x= 3y. Please post all steps.
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT