How do you find the lattice parameter of zinc blende?

Calculate the zinc-blende lattice parameter (a) using the formula: a = (4/3^(1/2)) x (combined radius). For example, the lattice parameter of GaAs is: a = 0.568 nm = (4/3^(1/2)) x (0.126 nm + 0.120 nm) = (4/3^(1/2)) x (R1 + R2).

How do you find the lattice constant?

Calculate the lattice constant, a, of the cubic unit cell. If the space lattice is SC, the lattice constant is given by the formula a = [2 x r]. For example, the lattice constant of the SC-crystallized polonium is [2 x 0.167 nm], or 0.334 nm.

What is the lattice constant of HCP?

HCP is one of the most common structures for metals. HCP has 6 atoms per unit cell, lattice constant a = 2r and c = (4√6r)/3 (or c/a ratio = 1.633), coordination number CN = 12, and Atomic Packing Factor APF = 74%.

What is the lattice structure of Zn?

The electronic configuration of zinc is: (Ar)(3d)10(4s)2, and it has an atomic radius of 0.138 nm. At room temperature the metal has the hexagonal close packed crystal structure. The lattice parameters are: a =0.266 nm, c = 0.495 nm.

What is lattice constant in semiconductor?

We can define lattice constant as the physical dimension of unit cells within a crystal lattice simply, it is the side length of the cube.

How do you calculate Ca ratio for hcp lattice?

Show that the c/a ratio for an ideal hexagonal close-packed structure is √8/3 = 1.633. If c/a is significantly larger than this value, the crystal structure may be thought of as composed of planes of closely packed atoms, the planes being loosely packed.

What is the Z for HCP?

The value of Z is 6 because 6 is the coordination number of HCP…

Is zinc blende FCC or BCC?

Zincblende/sphalerite is based on a fcc lattice of anions whereas wurtzite is derived from an hcp array of anions. In both structures, the cations occupy one of the two types of tetrahedral holes present.