var nc = 30, fc = new Array(nc); fc[0] = {t:"Alloy",d:"A blend of a host metal and one or more other elements, which may or may not be metals, that are added to change the properties of the host metal."}; fc[1] = {t:"Band Gap (Eg)",d:"The energy gap between the valence and conduction bands."}; fc[2] = {t:"Band Theory",d:"An extension of molecular orbital theory that describes bonding in solids."}; fc[3] = {t:"Body-Centered Cubic (bcc) Unit Cell",d:"A cell with atoms at the eight corners of a cube and at the center of the cell."}; fc[4] = {t:"Bragg Equation",d:"Relates the angle of diffraction (2θ) of X-rays to the spacing (d) between the layers of ions or atoms in a crystal: nλ = 2d sin θ."}; fc[5] = {t:"Ceramic",d:"A solid inorganic compound or mixture that has been transformed into a harder, more heat-resistant material by heating."}; fc[6] = {t:"Conduction Band",d:"An unoccupied band higher in energy than a valence band in which electrons are free to migrate."}; fc[7] = {t:"Covalent Network Solid",d:"A solid consisting of atoms held together by extended arrays of covalent bonds."}; fc[8] = {t:"Critical Temperature (TC)",d:"The temperature below which a material becomes a superconductor."}; fc[9] = {t:"Crystal Lattice",d:"A three-dimensional array of particles (atoms, ions, or molecules) in a crystalline solid."}; fc[10] = {t:"Crystal Structure",d:"An ordered arrangement in three-dimensional space of the particles (atoms, ions, or molecules) that make up a crystalline solid."}; fc[11] = {t:"Crystalline Solid",d:"A solid made of an ordered array of atoms, ions, or molecules."}; fc[12] = {t:"Cubic Closest-Packed (ccp)",d:"A crystal structure composed of face-centered cubic unit cells and layers of particles having an abcabc... stacking pattern."}; fc[13] = {t:"Face-Centered Cubic (fcc) Unit Cell",d:"An array of closest-packed particles that has eight of the particles at the corners of a cube and six of them at the centers of each face of the cube."}; fc[14] = {t:"Hexagonal Closest-Packed (hcp)",d:"A crystal lattice in which the layers of atoms or ions in hexagonal unit cells have an ababab... stacking pattern."}; fc[15] = {t:"Hexagonal Unit Cell",d:"An array of closest-packed particles that has seven of the particles on the top and bottom faces of a hexagonal prism and three of them in a middle layer."}; fc[16] = {t:"Interstitial Alloy",d:"Atoms of one element occupy the spaces between atoms of the host."}; fc[17] = {t:"Ionic Solid",d:"A solid consisting of monatomic or polyatomic ions held together by ionic bonds."}; fc[18] = {t:"Molecular Solid",d:"A solid formed by neutral, covalently bonded molecules held together by intermolecular attractive forces."}; fc[19] = {t:"n-Type Semiconductor",d:"Semiconductor containing electron-rich dopant atoms that contribute excess electrons."}; fc[20] = {t:"Ore",d:"A mineral that contains one or more metals valuable enough to be mined."}; fc[21] = {t:"Packing Efficiency",d:"Percentage of the total volume of a unit cell occupied by the spheres."}; fc[22] = {t:"p-Type Semiconductor",d:"Semiconductor containing electron-poor dopant atoms that cause a reduction in the number of electrons, which is equivalent to the presence of positively charged holes."}; fc[23] = {t:"Semiconductor",d:"A semimetal (metalloid) with electrical conductivity between that of metals and insulators that can be chemically altered to increase its electrical conductivity."}; fc[24] = {t:"Simple Cubic (sc) Unit Cell",d:"A cell with atoms only at the eight corners of a cube."}; fc[25] = {t:"Substitutional Alloy",d:"An alloy in which atoms of the nonhost metal replace host atoms in the crystal lattice."}; fc[26] = {t:"Superconductor",d:"A material that has zero resistance to the flow of electric current."}; fc[27] = {t:"Unit Cell",d:"The basic repeating unit of the arrangement of atoms, ions, or molecules in a crystalline solid."}; fc[28] = {t:"Valence Band",d:"A band of orbitals that are filled or partially filled by valence electrons."}; fc[29] = {t:"X-ray Diffraction (XRD)",d:"A technique for determining the arrangement of atoms or ions in a crystal by analyzing the pattern that results when X-rays are scattered after bombarding the crystal."};