Do CdS have hexagonal crystal structure?

Do CdS have hexagonal crystal structure?

Cadmium sulfide (CdS) exists in two natural forms: greenockite and hawleyite, which differ in their crystal structure. Greenockite forms hexagonal crystals with the wurtzite structure, hawleyite has the sphalerite (zinc blende) structure.

How many atoms are in a wurtzite unit cell?

four atoms
In the wurtzite structure, there are four atoms per unit cell. Hence, the average volume per atom in the wurtzite structure is given by ( /8)a2c. The wurtzite structure has uniaxial symmetry and a number of piezoelectric and pyroelectric crystals possess this structure.

What is the crystal structure of CdS?

Cadmium sulfide

What is wurtzite structure of ZnO?

The wurtzite structure of ZnO can be considered to be composed of two interpenetrating hexagonal close packed (hcp) sublattices of cation (Zn) and anion (O) displaced by the length of cation-anion bond in the c-direction . The lattice constant of the ZnO hexagonal unit cell are a=3.2500 Å and c=5.2060 Å.

What is the band gap of CdS?

CdS is a semiconductor with a band gap of 2.42 eV and a maximum absorption peak of 514 nm wavelength which shows CdS can absorb visible light and UV light within a wavelength of ≤ 514 nm.

Why CdS is N type semiconductor?

When a semiconductor is doped with a pentavalent impurity then 4 electrons of semiconductor form 4 covalent bonds with 4 electrons of the pentavalent impurity but 1 electron of impurity is left as it is. Due to which this doped semiconductor has 1 free electron so it is called n-type semiconductor.

What is the meaning of Wurtzite?

Definition of wurtzite : a brownish black mineral ZnS that consists of zinc sulfide in hemimorphic hexagonal crystals or a fibrous state and that is polymorphous with sphalerite.

What is Wurtzite used for?

Wurtzite Boron Nitride with plate shape particles is used as a raw material for sintering coarse grit polycrystalline structure powders, which are later used for manufacturing traditional cutting and grinding tools.

What is the bandgap of CdS?

2.42 eV
CdS is a semiconductor with a band gap of 2.42 eV and a maximum absorption peak of 514 nm wavelength which shows CdS can absorb visible light and UV light within a wavelength of ≤ 514 nm.

What is the compound of CdS?

Cadmium sulfide is a chemical compound that has the formula CdS. It is yellow in color and is a semiconductor of electricity. It exists as two different polymorphs, hexagonal greenockite and cubic hawleyite.

What are the properties of CdS?

Properties of Cadmium Sulfide