a) A material is composed of two atoms, A with effecitve radius 2.00 angstroms and B with effective radius 3.10 angstroms. The lattice is a body-centred lattice.
b)Enter the volume density of either the A or B atoms in atoms/cm3
surface density=# of atoms per lattice plane/area of lattice plane
The Attempt at a Solution
a=5.89 A (Lattice constant) (correct)
b) In part B I keep getting the wrong answer.
The equation I'm using is surface density=# of atoms/area of lattice plane
# of atoms should be 2 for a body centered cube
2/(5.89*10^-8)^3 = 9.79*10^21 atoms/cm^2 (incorrect)