Verify Euler's formula for these solids.

A binary solid (A^+ B^-) has a zinc blende structure with B^- ions constituting the lattice and A^+ ions occupying 25% of tetrahedral holes. The formula of the solid is

Using Euler's formula,find the unknown:

Using Euler's formula,find the number of faces if the number of vertices is 6 and the number of edges is 12.

A solid has a structure in which W atoms are located at the corners of a cubic lattice, O atom at the centre of edges, and Na atom at the centre of the cube. The formula for the compound is

In a crystallizes solid, anions B are arranged in cubic close packing, cations A are equally distributed between octahedral and tetrahedral voids, what is the formula of the solid?

is the floral formula of

An amorphous solid is :

A crystalline solid has A^- ions at the corners and face centres where as B^+ ions are at the body centre and edge centres of the unit cell. The simplest formula of the compound will be

Three element A,B and C crystallise into a cubic solid lattice. Atoms A occupy the corners, B occupy the cube centres and C occupy the edges. The formula of the compound is :

In a solid having rock salt structure, if all the atoms touching one body diagonal plane are removed (except at body centre), then the formula of the left unit cell is