Some properties of the crystals depends on the binding molecule coupled to a solid. These forces typically involve outermost electrons of atoms or molecules (or valence electrons) interactions. If the combination of strong, crystal has a higher melting point. If they are less when saving material, the crystal will have a lower melting point, it may be easier to bend and deform. If they are weak. Shandong days Yue Crystal Materials Co., crystals can only form at very low temperatures, then the energy of the molecule can be used much. There are four main crystal key. Ionic crystals constituted by positive and negative ions, by gravity (ionic bond) between different charge together. Sodium chloride is an example of ionic crystals. Atomic crystal (covalent crystals) of atoms or molecules share their valence electrons (covalent bond). Diamond, germanium and silicon are important covalent crystals. Metal crystal is changed to a metal atom ions, surrounded by a free valence electrons, they can be easily removed from one atom to another atom movement, the image may be described as immersed in a sea of ??free electrons (metallic bond). When these electrons full motion in the same direction, their motion is called current. Molecules of molecular crystals completely share their electrons. Is due to their binding molecule from one end to the other end there is a slight change in the electric field. Because this binding is weak (van der Waals forces and hydrogen bonding) Yue Crystal Materials Co., Ltd. Shandong days, these crystals at low temperatures to melt and low hardness. Typically, such as solid-state oxygen molecules crystallize and ice. In ionic crystals, the electron transfer from one atom to another. Covalent atomic crystals share their valence electrons. One end of a small amount of metal atom negative charge, the other end of a small amount of positive charge. A weak electrical attraction of the molecule in place. One technique used to make the industrial use of the crystal, is grown from the melt. Seed may be used to promote the formation of single crystals. In this step, the seed falling into a container containing a molten substance. Cooling the melt around the seed crystal, its molecules attached to the seed crystal. These new molecules receiving seed crystal orientation, forming a large single crystal. Joints refers to the actual interface between the single crystal twinning mutual engagement. Twinning to joints for the sector, both sides are not mutually continuous single crystal lattice. Joints can be stepped or very irregular, also for a plane, and is equivalent to two single crystals in a public face each other. Joints often in parallel with a simple index single crystal in the crystal surface, then you can use the symbol of the crystal surface, said joining direction. However, individual twinning, the joints may also be unreasonable for an index faces. Joining a single crystal can be parallel to the plane of symmetry, but in fact it is often coincident with the twin planes, or parallel to the twin crystal axis. Twinning law refers to the double-crystal single crystal interconnected among law students. Twinning law is characterized by a double-crystal elements, and has often been given a specific name. Its nomenclature is as follows: a recurrent feature of the double-crystal mineral named after. Such as spinel group minerals to (111) twin plane, said spinel law; to the initial discovery of the double crystal place names, such as feldspar to C axis, namely (001) double crystal zone axis Carlsbad Law twin crystal axis; twin crystal shape named group minerals such as rutile to (101) for the twin planes geniculate twinning law (also known as the elbow-shaped double-crystal); and engaging with the twin plane face names, such as calcite crystal plane to (012) negative rhombohedron of twin planes and joints of twinning is called negative rhombohedral twinning law. Shandong days Yue Yue Crystal Materials Co., Ltd. Shandong days _ advanced materials and new materials (certified) _ Jinan, Shandong days Yue provided by Spark Technology Development Company Limited. Jinan Spark Technology Development Co., Ltd. (www.sicc.cc) (www.sicc.cc) is a leader in Jinan, chemical equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Shandong days Yue leadership with the staff warmly welcome all inquiries negotiations to create Shandong days Yue a better future. You can also access (www.sicc.cc/supply_details_41188440.html), for more information about the company.