# A report on Crystal system and Crystal

Set of point groups .

- Crystal systemThese are grouped into 7 crystal systems, such as cubic crystal system (where the crystals may form cubes or rectangular boxes, such as halite shown at right) or hexagonal crystal system (where the crystals may form hexagons, such as ordinary water ice).

- Crystal4 related topics with Alpha

## Crystallography

2 linksExperimental science of determining the arrangement of atoms in crystalline solids.

Experimental science of determining the arrangement of atoms in crystalline solids.

Before the development of X-ray diffraction crystallography (see below), the study of crystals was based on physical measurements of their geometry using a goniometer.

Coordinates in angle brackets or chevrons such as <100> denote a family of directions which are related by symmetry operations. In the cubic crystal system for example, would mean or the negative of any of those directions.

## Cubic crystal system

2 linksIn crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube.

This is one of the most common and simplest shapes found in crystals and minerals.

## Bravais lattice

1 linksInfinite array of discrete points generated by a set of discrete translation operations described in three dimensional space by

Infinite array of discrete points generated by a set of discrete translation operations described in three dimensional space by

A crystal is made up of one or more atoms, called the basis or motif, at each lattice point.

In two-dimensional space there are 5 Bravais lattices, grouped into four lattice systems, shown in the table below.

## Crystal structure

1 linksIn crystallography, crystal structure is a description of the ordered arrangement of atoms, ions or molecules in a crystalline material.

They are similar to, but not quite the same as the seven crystal systems.