Question

For an ionic crystal of the general formula AX and coordination number 6, the value of radius ratio will be

Solution

Correct option is

In between 0.732 and 0.414

The structure arrangement of coordination number 6 is octahedral and its radius ratio is 0.414 – 0.732. The example of octahedral is KCl and NaCl.

SIMILAR QUESTIONS

Q1

In octahedral holes (voids)

Q2

The number of octahedral sites per sphere in a fcc structure is

Q3

The interionic distance for cesium chloride crystal will be

Q4

For cubic coordination, the value of radius ratio is

Q5

The ratio of cationic radius of anionic radius in an ionic crystal is greater than 0.732. its coordination number is

Q6

The vacant space in the bcc unit cell is

Q7

Calculate the ionic radius of a Cs+ ion, assuming that the cell edge length for CsCl is 0.4123 nm and that the ionic radius of a Cl- ion 0.181 nm.

Q8

If the value of ionic radius ratio  is 0.52 in an ionic compound, the geometrical arrangement of ions in crystal is

Q9

A metal has bcc structure and the edge length of its unit cell is 3.04 . The volume of the unit cell in cm3 will be

Q10

In A+ B- ionic compound, radii of A+ and B- ions are 180 pm and 187 pm respectively. The crystal structure of this compound will be