lattice systems, crystal systems and crystal families. The various classifications are often confused: in particular the trigonal crystal system is often...

In crystallography, the hexagonal crystal family is one of the 6 crystal families, which includes two crystal systems (hexagonal and trigonal) and two...

In crystallography, crystal structure is a description of ordered arrangement of atoms, ions, or molecules in a crystalline material. Ordered structures...

Crystal Palace Football Club (commonly referred to as simply Palace) is a professional football club based in Selhurst in the Borough of Croydon, South...

or Fedorov groups, and represent a description of the symmetry of the crystal. A definitive source regarding 3-dimensional space groups is the International...

William Edward Crystal (born March 14, 1948) is an American comedian, actor, and filmmaker. He is known as a standup comedian and for his film and stage...

the evil, ruling Skeksis by restoring a powerful broken Crystal. It was marketed as a family film, but was notably darker than the creators' previous...

Waterford Crystal is a manufacturer of lead glass or "crystal", especially in cut glass, named after the city of Waterford, Ireland. In January 2009,...

formally define a crystalline arrangement and its (finite) frontiers. A crystal is made up of one or more atoms, called the basis or motif, at each lattice...

substance with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form. The geological definition...