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Saturday, April 17, 2021

Rutile (TiO2) type Structure:

This type of structure is represented by TiO2 and other example are includes MnO2 , SnO2 , MgF2, NiFetc 

In Rutile structure:

O-2  = ions forms hexagonal cubic packing (HCP).

M+4 =Tetravalent cations are occupied 50 % (1/2) of octahedral voids (OV) while all the tetrahedral voids (TO) are empty.

HCP= Lattice points (LP) = O-2= 6

M+4 ions = OV (50%) =6 x 1/2 = 3

M3O6 = MO2

It means each HCP unit cell certain three (M+4 ) and  six (O-2 )ions

Related Questions:

What are the normal spinel structures?

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