Crystalline Structures

We were going over the structures of crystalline structures and the professor seemed to struggle to represent it nicely in 3D. I'm not sure if it is a common problem for students (I didn't think it was so hard to picture), but I decided to make a 3D representation of it that I thought would help.

Let me know what you think. Are they accurate enough? Are they helpful?
View attachment 112790
These look great tbh. The transparent internal wall of the spheres is a really useful feature
For a larger variety of crystal structures try a software like xcrysden, or better yet get Quantumwise's Virtual NanoLab with a free academic license and use it to see cif files of different crystals.
Wouldn't the element deem that? I.e carbon (single element) vs Alumina (AlO3 a compound)

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