Unit cells of solids crystal lattices. Ionic, atomic, molecular, metallic. Crystal structures of NaCl salt, diamond, carbon dioxide CO2, iron metal Fe. Educational chemistry. Flat vector illustration. Download a free preview or high-quality Adobe Illustrator (ai), EPS, PDF vectors and high-res JPEG and PNG images.
Bravais Crystal Lattices: Face-Centered Orthorhombic Bravais Crystal Lattice.Orthorhombic lattices are made by stretching a cubic lattice along two lattice vectors by two factors, forming a rectangular prism with a rectangular base. All three bases intersect at 90° angles and the three lattice vectors are mutually orthogonal. Photo Credit: DrBob, wikipedia.org
There are two types of Semiconductors. They are Intrinsic and Extrinsic semiconductors. Types of Semiconductors Intrinsic Semiconductor Extrinsic Semiconductor Intrinsic Semiconductor A semiconductor in its pure form without impurity is called an intrinsic semiconductor. Here impurity means any other atom in the crystal lattice. Each Silicon atom has four electrons in the outermost orbit and ... Read more
Model of the molecular structure made as an educational aid for classroom or exhibit, made in Germany in the mid 20th century of metal rods connecting wood spheres painted green and gold. This presumably illustrates how salt crystals can grow larger. It is not labelled, but probably was made by Leybold’s, Cologne, Germany.
In any sort of discussion of crystalline materials, it is useful to begin with a discussion of crystallography: the study of the formation, structure, and properties of crystals. A crystal structure is defined as the particular repeating arrangement of atoms (molecules or ions) throughout a crystal. Structure refers to the internal arrangement of particles and not the external appearance of the crystal. However, these are not entirely independent.