What is the radius ratio in ZnS?
In zinc sulphide, ZnS, the radius ratio is 0.40.
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 radius of a lattice constant?
The atomic radius of copper is 0.128 nm, while that of iron is 0.124 nm. 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].
Is ZnS BCC?
Zinc sulfide (ZnS) is a unique compound that forms two types of crystalline structures. These two polymorphs are wurtzite and zincblende (also known as sphalerite). Wurtzite has a hexagonal structure, while zincblende is cubic….Introduction.
| Site | Zn | S |
|---|---|---|
| Total | 4 | 4 |
What is the coordination number of Zn in ZnS?
4
ZnS occurs in two common polytypes, zincblende (also called sphalerite) and wurtzite. The two types have these features in common: a 1:1 stoichiometry of Zn:S. a coordination of 4 for each ion (4:4 coordination)
What is the radius in BCC lattice?
The relation between edge length (a) and radius of atom (r) for BCC lattice is √(3a) = 4r .
What is coordination number of zinc in ZnS?
In zinc blende structure (ZnS), sulphide ions are face-centred and zinc is present in alternate tetrahedral voids. Formula is ZnS. Coordination number of Zn is 4 and that of sulphide is 4.
How are anions arranged in ZnS?
Zincblende has 4 asymmetric units in its unit cell whereas wurtzite has 2. To recap, zincblende is best thought of as a face-centered cubic array of anions cations occupying one half of the tetrahedral holes. Each ion is 4-coordinate and has local tetrahedral geometry.