If in a crystal lattice of a compound, each corner of a cube is enjoyed by sodium, each edge of a cube has oxygen and centre of cube is enjoyed by tungsten (W), then give its formula [Guj. CET 2011]

In a crystal lattice of a compound, sodium atoms are present at the 8 corners of the cube, therefore, Number of Na atoms in the unit cell = 1 8 1 8 x W, atoms are present at the cube centers, Number of W atoms in the unit cell =1 Oxygen atoms are present at the edge. Since there are 12 edges and each edge is shared by four unit cells. Number of O atoms in the unit cell = 1 12 3 4 x The formula of the compound 3 NaWO Hence the correct answer is option (b)