Calculate the d-spacing of the (1̅121) planes for monoclinic ZrO2. The values of a, b, and c are 5.31290, 5.21250 and 5.14710 Å respectively and b is 99.22 degrees.

What is y(x) given that d²y dx² +4e-2x = 0 where you have the boundary conditions: dy dx y = yo (a constant) at You have to integrate twice as this is a second order differential equation so you need two boundary conditions to get the complete solution. (Most people are better at differentiating then integrating so check your answer by differentiating it!) = q (a constant) at x = 0 x = 0

The interplanar spacing of (121) planes is 4.5Å for a cubic crystal. Find the atomic radius for a face-centred cubic close packed structure.

I got sqrt(g/4) as my omega from part d. However, I don't how to proceed from there to answer part e,f and g