Most natural and synthetic diamonds feature a cubic lattice structure but there are rare exceptions. Lonsdaleite, for example ...

Researchers at RMIT University have developed a groundbreaking new material inspired by the skeleton of a deep-sea sponge.

The stable form of carbon at room temperature is Graphite which has a hexagonal crystal ... (Lower diagram) The diamond cubic structure is a face-centered-cubic lattice with a basis of two carbon ...