The lattice points are touching one another but not in the most efficient way. In other words, we are creating a lot of empty space between the atoms. In order to generate the simple cubic structure, ...

It melts at 3727 C. The stable form of carbon at room temperature is Graphite which has a hexagonal crystal structure. (Top diagram) Diamond is metastable at room temperature and has a diamond cubic ...

In the example shown below, (SrTiO3, download cif) the Sr atoms sit in the 12 coordinate A site, while the Ti atoms occupy the 6 coordinate B site. There are many ABO3 compounds for which the ideal ...