00:01
Hello everyone.
00:02
So the density of a material using the properties of crystal structure, that is, rho is equal to n -a -g -e multiplied by a -g -e, whole divided by v -c multiplied by n -a.
00:25
So let this be equation 1.
00:28
Hence, density of material is row.
00:30
Number of atoms per cell is n -a -g -e, and atomic mass of germanium is a g e and volume of unit cell is vc so here if we express the volume of unicell for cubic structure using lattice parameter will get a not cube so now we'll get row is equal to n a g e g multiplied by a g e divided by a 0 cube multiplied by n .a.
01:12
So from here we'll get a0 as equals to cube root of n .a .g.
01:24
Multiplied by a .g.
01:28
Divided by row multiplied by n .a.
01:33
So now since germanium crystal is same as diamond, according to the diamond cubic structure, there are 8 atoms per unit.
01:43
Itself...