According to his observations mellitic acid is dimorphic: rhombohedral when crystallized from aqueous solution at room temperature, and of an unidentified lower symmetry class when separated from ...

The crystal structure of bismuth is noteworthy. Unlike many metals, which crystallize in a cubic structure, bismuth forms rhombohedral crystals. This means that the crystal lattice is skewed ...

MIT physicists have made an exciting discovery: in an ultra-thin material, electrons can form crystal-like structures, acting like tiny frozen blocks of energy. This unexpected finding adds to a ...