In Rocksalt structure:a)Cation is present at corners as well face cent...
Answer is option B but iam unable to post that picture so I keep that solution in my profile photo
In Rocksalt structure:a)Cation is present at corners as well face cent...
Explanation:
In a Rocksalt structure, the arrangement of cations and anions in a crystal lattice is determined by the coordination number and the sizes of the ions.
Coordination Number:
The coordination number is the number of ions that surround a particular ion in a crystal lattice. In a Rocksalt structure, the coordination number of both cations and anions is 6. This means that each cation is surrounded by 6 anions, and each anion is surrounded by 6 cations.
Arrangement of Ions:
In a Rocksalt structure, the arrangement of ions can be understood by considering the packing of spheres. The cations and anions can be thought of as spheres that are packed together in a regular pattern.
Cation and Anion Arrangement:
Option B is the correct answer, which states that the anions are present in the corners as well as the face center of the unit cell, while the cations are present in the octahedral voids.
Explanation of Option B:
In a Rocksalt structure, the anions are larger than the cations. Therefore, the anions occupy the larger spaces in the crystal lattice, which are the corners and the face center of the unit cell.
The cations, being smaller in size, fit into the smaller spaces between the anions. These smaller spaces are known as octahedral voids. Each octahedral void is surrounded by 6 anions, giving the cation a coordination number of 6.
This arrangement ensures that the cations and anions are in close proximity to each other, maximizing the attractive forces between them.
Summary:
In summary, in a Rocksalt structure, the anions are present in the corners as well as the face center of the unit cell, while the cations are present in the octahedral voids. This arrangement is determined by the coordination number and the sizes of the ions.