1
Question
How many 'nearest' and 'next nearest' neighbors respectively does potassium have in b.c.c lattice?
How many 'nearest' and 'next nearest' neighbors respectively does potassium have in b.c.c lattice?
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Solution
The correct option is B 8,6
In bcc lattice the
corner atoms are called as the nearest neighbours and also a bcc
structure has 8 corners atoms, so the potassium atom will have 8
nearest neighbours.
Second nearest neighbors are the neighbors
of the first neighbors. So for BCC let's consider the atom at the
body centre, for this atom the atom at the corner are nearest and for
the atoms at the corners the atom at body centres of other cubes are
nearest. Little imagination(there are 6 body centred atoms
surrounding the atom we are considering) and counting gives the
answer as six.
In bcc lattice the
corner atoms are called as the nearest neighbours and also a bcc
structure has 8 corners atoms, so the potassium atom will have 8
nearest neighbours.
Second nearest neighbors are the neighbors
of the first neighbors. So for BCC let's consider the atom at the
body centre, for this atom the atom at the corner are nearest and for
the atoms at the corners the atom at body centres of other cubes are
nearest. Little imagination(there are 6 body centred atoms
surrounding the atom we are considering) and counting gives the
answer as six.
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