Home
Class 11
CHEMISTRY
The Ca^(2+)andF^(-) are located in CaF(2...

The `Ca^(2+)andF^(-)` are located in `CaF_(2)` crystal, respectively at face centred cubic lattice points and in

A

Tetrahedral void

B

half of tetrahedral points

C

octahedral points

D

half of octahedral voids.

Text Solution

Verified by Experts

The correct Answer is:
A
In `CF^(2)` crystal, `Ca^(2^+)`ions are present at all corners and at the centre of each face of the cube and `F^(-)` ions occupy all the tetrahedral voids.
Promotional Banner

Similar Questions

Explore conceptually related problems

The Ca^(2+) and F^(-) ions arc located in CaF_(2) crystal respectively at face centred cubic lattice points and in

An example of a face centred cubic lattice is

The Ca^(2+) and F^(-) ions arc located in CaF_(2) crystal respectively at what position ? What is the charge ratio ?

Sodium chloride crystallises in a face centred cubic lattice in which each

What is the packing fraction in face centred cubic lattice ?

What is the C.N of Ca^(2+) and F^(-) ions in CaF_(2) crystal lattice ?

Body -centred cubic lattice has a corrdination number of

The well know mineral flourite is chemically calcium fluoride. It is a well known fact that in one unit cell of this mineral, there are four Ca^(2+) ions and eight F^(-) ions and Ca^(2+) ions are arranged in f.c.c. lattice. The F^(-) ions fill all the tetrahedral holes in the face centred cubic lattice of Ca^(2+) ions. The edge length of the unit cell is 5.46xx10^(-8) cm. The density of the solid is 3.18"g cm"^(-3) . Use this information to calculate Avogadro's number (Molar mass of CaF_(2)=78.0"g mol"^(-1) )

The well know mineral flourite is chemically calcium fluoride. It is a well known fact that in one unit cell of this mineral, there are four Ca^(2+) ions and eight F^(-) ions and Ca^(2+) ions are arranged in f.c.c. lattice. The F^(-) ions fill all the tetrahedral holes in the face centred cubic lattice of Ca^(2+) ions. The edge length of the unit cell is 5.46xx10^(-8) cm. The density of the solid is 3.18"g cm"^(-3) . Use this information to calculate Avogadro's number (Molar mass of CaF_(2)=78.0"g mol"^(-1) )

The number of tetrahedral voids in the unit cell of a face centred cubic lattice of similar atoms is