Question

Potassium fluoride has NaCl type structure. What is the distance between K+ and F- ions if cell edge is a cm?

Solution

Correct option is

a/2 cm

Distance between K+ and F- 1/2  × length of the edge.

SIMILAR QUESTIONS

Q1

Sodium metal crystallizes as a body centred cubic lattice with the cell edge 4.29 . What is the radius of sodium atom?

Q2

An fcc lattice has a lattice parameter a = 400 pm. Calculate the molar volume of the lattice including all the empty space.

Q3

The structure of Na2O crystal is

Q4

Structure similar to zinc blende is found in

Q5

The number of equidistance oppositely charged ions in a sodium chloride crystal is

Q6

What is the coordination number of sodium in Na2O?

Q7

In zinc blende structure, the coordination number of Zn2+ ion is

Q8

In the calcium fluoride structure, the coordination number of the cation and anion are respectively

Q9

When a certain crystal was studied by the Bragg technique using X – rays of wavelength 229 pm, an X – ray reflection was observed at an angle of 230 20’. What is the corresponding interplanar spacing? [sin (23020’) = 0.396]

Q10

Which defect causes decreases in the density of crystal?