# Differences between space lattice and lattice point?

- Lattice points are imaginary points in space about which an atom is located. They denote positions of atoms.

- Space lattice is an infinite three dimensional array of points in which each any every point has its own identical environment. The totality of all such points is space lattice.

Space lattice:it is the regular arrangement of the constituent particles(atoms,ions or molecules) of a crystalline solid in three dimensional space.

Lattice points or Lattice sites:They are the positions occupied by the atoms,ions or molecules in crystal lattice.

### What is the use of reciprocal lattice in crystal?

In physics, the reciprocal lattice of a lattice (usually a Bravais lattice) is the lattice in which the Fourier Transform of the spatial function of the original lattice (or direct lattice) is represented. This space is also known as momentum space or less commonly k-space, due to the relationship between the Pontryagin momentum and position. The reciprocal lattice of a reciprocal lattice is the original or direct lattice.

### Why are steels harder than pure iron?

the atoms are closer together, making it denser and therefore stronger (think of the differences between a solid and liquid, but to a lesser degree) Actually "steels" are just just forms of elemental iron that have impurities, such as carbon, introduced into the material during manufacturing. when Iron is heated the space between the crystal lattices is farther apart. (actually completely different lattice structures all together) When the iron hardens these impurities are trapped within…