What is the difference between molecule polymer and lattice

We can define a lattice as a solid that has a three- dimensional ordered arrangement of basic units. The basic unit can be an atom, molecule or an ion. Thus, lattices are crystalline structures with these repeated basic units. Furthermore, if this network contains ions joined with ionic bonds, we call them as ionic crystals.

For example, sodium chloride is an ionic lattice. Chlorine is a nonmetal and has the ability to form a -1 charged anion. In the lattice, six chloride ions surround each sodium ion and vice versa. Due to all the electrostatic attractions between ions, the lattice structure is highly stable. The number of ions present in the lattice varies with the size of it.

Lattice energy or enthalpy of the lattice is the measure of the strength of the ionic bonds in the lattice. Normally lattice enthalpy is exothermic. Diamond and quartz are two examples of three-dimensional covalent lattices. Diamond is consisting of only carbon atoms, and each carbon atom covalently binds to four other carbon atoms to form the lattice structure. These oppositely charged ions attract each other to form ionic networks, or lattices.

When many ions attract each other, they form large, ordered, crystal lattices in which each ion is surrounded by ions of the opposite charge. Compounds that exist as giant repeating lattice structures are called network structures. Examples include covalent molecules such as diamond, graphite and silica.

Ionic substances are also network structures, for example a sodium chloride crystal is a huge lattice of repeating units made of sodium and chloride ions. Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. At room temperature and pressure, another solid form of carbon known as graphite is the chemically stable form of carbon, but diamond almost never converts to it.

Diamond Formula mass In the coarse grained approach adopted herein the molecules and metal atoms were modeled by discrete segments, two connected and one, respectively, placed on a triangular lattice representing a metallic surface. Our simulations focused on the influence of the intramolecular distribution of the substituents on the morphology of the resulting superstructures.

Special attention was paid to the molecules that create porous networks characterized by long-range order. Moreover, the structural analysis of the assemblies comprising prochiral building blocks was made by running simulations for the corresponding enantiopure and racemic adsorbed systems. The obtained results demonstrated the possibility of directing the on-surface self-assembly towards networks with controllable pore shape and size.

These findings can be helpful in designing covalently bonded 2D superstructures with predefined architecture and functions. Lisiecki and P. Szabelski, Phys. To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page. Please wait while we load your content Something went wrong. Try again? Cited by. Download options Please wait Article type Feature Article. Submitted 24 Mar Accepted 20 Jul First published 21 Jul