These crystals repeat their patterns at regular time intervals, not distances
It was only a matter of time.
A weird form of matter called a time crystal has made an appearance in two more types of materials, doubling the number of known time crystal habitats. In a typical crystal, its arrangement of atoms regularly repeats in space, such as the alternating sodium and chloride ions that make up a salt crystal. But time crystals’ patterns repeat themselves at regular time intervals.
A team of scientists created a time crystal in a solid material called monoammonium phosphate, the researchers report in both the May 4 Physical Review Letters and the May 1 Physical Review B. Another team made its time crystal in a type of liquid containing star-shaped molecules, according to a study