a. A homogenous solid formed by a repeating, three-dimensional pattern of atoms, ions, or molecules and having fixed distances between constituent parts. b.

The scientific definition of a "crystal" is based on the microscopic arrangement of atoms inside it, called the crystal structure. A crystal is a solid where the atoms ...

Through these pages you can learn what types of crystals there are, why different crystals have different shapes and sizes, find out how light affects the color of a ...