Devarshi Singh answered this

• 12 x 1/6 + 2 x 1/2 + 3 = 6 atoms per unit cell for HCP. Coordination Number Coordination number relates the number of equidistant nearest neighbors an atom has, and is different for FCC, BCC, and HCP structures. FCC The atom in the center of a close packed plane, such as fig.3a, has six nearest.
• Click here👆to get an answer to your question ️ A compound is formed by two elements P and Q. Atoms of Q (as anions) make hcp lattice and those of the element P (as cations) occupy all the tetrahedral voids.
• For the HCP cell, there are 12 corner atoms. Each corner atom has ⅙ of its volume inside the unit cell. To visualize this, imagine that you joined many unit cells together. Each corner atom would be shared between 6 other cells, so it contributes ⅙ to each. There are 2 atoms.

coordination no. of hcp arrangement is 12 and that of ccp is 12. refer the pattern of fcc it is ABCABCABC... type structure i n which central atom in B type is surrounded by 6 atoms from side 3 from upward and three from downward. in ccp A and C has structural difference . but both has same no. of atoms.

in hcp there is ABABAB......... type pattern where central atom at B is surrounded by 6 atoms of B ; 3 of A from upward and 3 atoms of A From downward.

Number of atoms in hexagonal close-packed (HCP) unit cell. Whenever the atomic packing factor for the hexagonal close-packed (HCP) crystal structure is discussed, such as in this wikipedia article, it is stated that the (effective) number N of atoms in a unit cell (chosen as a hexagonal prism) is 6 - corner atoms contribute 1 / 6 each, face-centred atoms contribute 1 / 2 each, and middle-layer atoms contribute 1. In a unit cell, an atom's coordination number is the number of atoms it is touching. The hexagonal closest packed (hcp) has a coordination number of 12 and contains 6 atoms per unit cell. The face-centered cubic (fcc) has a coordination number of 12 and contains 4 atoms per unit cell.

( Refer NCERT ; Class 12 ; page no 15 )

sakshi.. answered this

Vinod Sharma answered this

Rohan D. Maisuria answered this

• HCP - 12

• CCP - 12

D J answered this
English to marathi learning book.

Nikhil Soni answered this

Shweta Singh Rajput answered this

Diksha answered this

No Of Atoms In Hcp Unit

Hemant Kumar Singh Champawat answered this

Number Of Atoms In Hcp Unit Cell

Dheeraj Thakur answered this

Somu answered this

No Of Atoms In Hcp Unit Cell Is