239.48 KB - KFUPM Resources v3
... (a) If the atomic packing factor and atomic radius are 0.547 and 0.177 nm, respectively, determinethe number of atoms in each unit cell. (b) The atomic weight of iodine is 126.91 g/mol; compute its theoretical density. ...
... (a) If the atomic packing factor and atomic radius are 0.547 and 0.177 nm, respectively, determinethe number of atoms in each unit cell. (b) The atomic weight of iodine is 126.91 g/mol; compute its theoretical density. ...
What are we studying in the EPR lab?
... It is important to properly locate and assign the axis of crystal • The systems of crystal are anisotropic and thus the magnitude of hyperfine coupling constants, the important magnetic parameters to assign the free radicals, depend strongly on orientation in external magnetic field. • In order to ...
... It is important to properly locate and assign the axis of crystal • The systems of crystal are anisotropic and thus the magnitude of hyperfine coupling constants, the important magnetic parameters to assign the free radicals, depend strongly on orientation in external magnetic field. • In order to ...
Slide 1
... this number can be higher due to specific intermolecular factors. For multiple-component structures, the APF can exceed 0.74. ...
... this number can be higher due to specific intermolecular factors. For multiple-component structures, the APF can exceed 0.74. ...
Homework 1 - Devin Gatherwright IET 307 Portfolio
... 5. What are unit cell, lattice constant and the number of atoms per unit cell? What is the number of atoms per unit cell for BCC, FCC and HCP? Answer: Unit cells can be defined as small repeat entities that describe crystal structures. Unit cells are usually parallelepipeds or prisms that have three ...
... 5. What are unit cell, lattice constant and the number of atoms per unit cell? What is the number of atoms per unit cell for BCC, FCC and HCP? Answer: Unit cells can be defined as small repeat entities that describe crystal structures. Unit cells are usually parallelepipeds or prisms that have three ...
a = b = c
... discrete steps by a set of basis vectors. •In 3-D, there are 14 unique Bravais lattices. All crystalline materials fit in one of these arrangements. In 3-D, the translation vector is r = ha + kb + lc ...
... discrete steps by a set of basis vectors. •In 3-D, there are 14 unique Bravais lattices. All crystalline materials fit in one of these arrangements. In 3-D, the translation vector is r = ha + kb + lc ...
Crystal pressure in nanoscale pores Many pharmaceutical
... pharmaceuticals are delivered orally and must dissolve in the gastrointestinal fluid to be absorbed by the body. Drug dissolution rate is proportional to surface area, so a common formulation strategy is to structure drugs as small as possible to maximize surface area. A simple approach to create ve ...
... pharmaceuticals are delivered orally and must dissolve in the gastrointestinal fluid to be absorbed by the body. Drug dissolution rate is proportional to surface area, so a common formulation strategy is to structure drugs as small as possible to maximize surface area. A simple approach to create ve ...
Mineral definition and classification
... The chemical composition may vary between end members of a mineral system. For example the plagioclase feldspars comprise a continuous series from sodium-rich albite (NaAlSi3O8) to calcium-rich anorthite (CaAl2Si2O8) with four recognized intermediate compositions between. Mineral-like substances tha ...
... The chemical composition may vary between end members of a mineral system. For example the plagioclase feldspars comprise a continuous series from sodium-rich albite (NaAlSi3O8) to calcium-rich anorthite (CaAl2Si2O8) with four recognized intermediate compositions between. Mineral-like substances tha ...
X‐ray diffraction: Determining lattice constants of crystal structure
... the emitted x-rays have the following characteristic wavelengths: Kα = 71.08 pm and Kβ = 63.09 pm. These xrays are collimated into a beam by the collimating slit and the incident beam makes an angle θ with the surface of the crystal sample. The detector, a Geiger-Müller tube is mounted in such a way ...
... the emitted x-rays have the following characteristic wavelengths: Kα = 71.08 pm and Kβ = 63.09 pm. These xrays are collimated into a beam by the collimating slit and the incident beam makes an angle θ with the surface of the crystal sample. The detector, a Geiger-Müller tube is mounted in such a way ...
Solid state physics
... Programme worth 6 ECTS credits for the second-level degree in physics: 1. From the Drude model to the Sommerfeld theory of metals. Limits of the free electron model. 2. Structural order and disorder. The crystal lattice. The reciprocal lattice. Diffraction of x-rays by crystals. Bravais lattices and ...
... Programme worth 6 ECTS credits for the second-level degree in physics: 1. From the Drude model to the Sommerfeld theory of metals. Limits of the free electron model. 2. Structural order and disorder. The crystal lattice. The reciprocal lattice. Diffraction of x-rays by crystals. Bravais lattices and ...
What has been presented?
... Types of Diffusion Self-diffusion: movement of atoms through their own lattice Interdiffusion (impurity diffusion): diffusion of species not part of the crystal structure Example: movement of Ni through the lattice of Cu ...
... Types of Diffusion Self-diffusion: movement of atoms through their own lattice Interdiffusion (impurity diffusion): diffusion of species not part of the crystal structure Example: movement of Ni through the lattice of Cu ...
Solid State Physics (I)
... – All kinds of materials including noble gases may form fcc crystal because the larger the coord# the more stable the structure: • Ca, Ce, Ag, Al, Au, Cu, Ni, Pb, Pt, and Ar, Ne, Xe, Kr at low ...
... – All kinds of materials including noble gases may form fcc crystal because the larger the coord# the more stable the structure: • Ca, Ce, Ag, Al, Au, Cu, Ni, Pb, Pt, and Ar, Ne, Xe, Kr at low ...
Structure of Minerals
... the mineral. A mineral is a solid because of the close packing of its ions or atoms and the strong forces of attraction between them The hardness of a mineral depends on the arrangement of its ions or atoms Carbon forms diamond, the hardest natural mineral. Carbon also forms graphite, a very soft mi ...
... the mineral. A mineral is a solid because of the close packing of its ions or atoms and the strong forces of attraction between them The hardness of a mineral depends on the arrangement of its ions or atoms Carbon forms diamond, the hardest natural mineral. Carbon also forms graphite, a very soft mi ...
Crystal structure
In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms, ions or molecules in a crystalline liquid or solid. It describes a highly ordered structure, occurring due to the intrinsic nature of its constituents to form symmetric patterns.The crystal lattice can be thought of as an array of 'small boxes' infinitely repeating in all three spatial directions. Such a unit cell is the smallest unit of volume that contains all of the structural and symmetry information to build-up the macroscopic structure of the lattice by translation.Patterns are located upon the points of a lattice, which is an array of points repeating periodically in three dimensions. The lengths of the edges of a unit cell and the angles between them are called the lattice parameters. The symmetry properties of the crystal are embodied in its space group.A crystal's structure and symmetry play a role in determining many of its physical properties, such as cleavage, electronic band structure, and optical transparency.