I try my best to find an answers for these questions : 1- anion has a radius of
ID: 874070 • Letter: I
Question
I try my best to find an answers for these questions :
1- anion has a radius of 133 Pm and the cation has a radius of 74 Pm then :
A- The cation will fit in a tetrahedral hole . B- The cation will fit in an octahedral hole . C- The anion will fit in a tetrahedral hole . D- The anion will fit in an octahedral hole .
2- Whats an advantage of tetrahedral holes over octahedral holes :
A- they are found in close-packed structre .
B- they are large .
C- None of these are correct .
D- there are more of them .
3- Lattice is the argument of particles in a crystalline structure . assuming this is also an ionic structure , the ion must:
" Complete the sentence " .
Tank you !
I try my best to find an answers for these questions :
1- anion has a radius of 133 Pm and the cation has a radius of 74 Pm then :
A- The cation will fit in a tetrahedral hole . B- The cation will fit in an octahedral hole . C- The anion will fit in a tetrahedral hole . D- The anion will fit in an octahedral hole .
2- Whats an advantage of tetrahedral holes over octahedral holes :
A- they are found in close-packed structre .
B- they are large .
C- None of these are correct .
D- there are more of them .
3- Lattice is the argument of particles in a crystalline structure . assuming this is also an ionic structure , the ion must:
" Complete the sentence " .
Tank you !
Explanation / Answer
usually in ionic crystals cations will occupy voids and anions will form the crystal arrangement.
if radious ratio of cation to anion is greaterthan 0.414 then cation will accupy octahedral hole.
in given case we are getting 0.55 is radious ratio so the cation will occupy octahedral hole.
being smaller the size of tetrahedral hole cations can fit exactly in tetrahedral hole so perfect crystal arrangement will come. more number of tetrahedral voids will be present in any crystal arrangement .
in lattice the ions must be neutralize by the way of coordination number.