| Journal Articles: 33 results |
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A-DNA and B-DNA: Comparing Their Historical X-ray Fiber Diffraction Images Amand A. Lucas
This paper provides a comparative explanation of the structural content of the diffraction diagrams of A-DNA and B-DNA that facilitated the discovery of the double-helical structure of DNA by Watson and Crick in 1953. This analysis is supported a method that simulates both A-DNA and B-DNA X-ray images optically.
Lucas, Amand A. J. Chem. Educ. 2008, 85, 737.
Biophysical Chemistry |
Conformational Analysis |
Crystals / Crystallography |
X-ray Crystallography |
Nucleic Acids / DNA / RNA
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Use of the Primitive Unit Cell in Understanding Subtle Features of the Cubic Close-Packed Structure John A. Hawkins, Linda M. Soper, Jeffrey L. Rittenhouse, and Robert C. Rittenhouse
Examines the pedagogical advantages in presenting the primitive rhombohedral unit cell as a means of helping students to gain greater insight into the nature of the cubic close-packed structure.
Hawkins, John A.; Soper, Linda M.; Rittenhouse, Jeffrey L.; Rittenhouse, Robert C. J. Chem. Educ. 2008, 85, 90.
Crystals / Crystallography |
Metals |
Solids
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Stuffed Derivatives of Close-Packed Structures Bodie E. Douglas
Examines a variety of stuffed silica crystal structures in terms of the close-packing of one set of atoms or ions (P sites) with other atoms or ions in tetrahedral (T) or octahedral (O) sites and filled or partially filled layers in the regular pattern, PTOT.
Douglas, Bodie E. J. Chem. Educ. 2007, 84, 1846.
Crystals / Crystallography |
Group Theory / Symmetry |
Materials Science |
Metals |
Solid State Chemistry |
Solids
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Fabrication and Analysis of Photonic Crystals Dean J. Campbell, Kylee E. Korte, and Younan Xia
Presents a set of laboratory experiments designed to explore aspects of nanoscale chemistry by constructing and spectroscopically analyzing thin films of photonic crystals. Topics covered include crystallization and diffraction.
Campbell, Dean J.; Korte, Kylee E.; Xia, Younan. J. Chem. Educ. 2007, 84, 1824.
Crystals / Crystallography |
X-ray Crystallography
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Powder Diffraction Simulated by a Polycrystalline Film of Spherical Colloids Dean J. Campbell and Younan Xia
This article describes a simple way to demonstrate powder diffraction in a classroom setting using a dry film of spherical colloids on a glass substrate.
Campbell, Dean. J.; Xia, Younan. J. Chem. Educ. 2006, 83, 1638.
Crystals / Crystallography |
Mathematics / Symbolic Mathematics |
X-ray Crystallography |
Materials Science
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Paper-and-Glue Unit Cell Models James P. Birk and Ellen J. Yezierski
Templates for a variety of unit cells that can be copied, cut out, and assembled.
Birk, James P.; Yezierski, Ellen J. J. Chem. Educ. 2003, 80, 157.
Solid State Chemistry |
Solids |
Crystals / Crystallography |
Molecular Modeling
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Crystal Models Made from Clear Plastic Boxes and Their Use in Determining Avogadro's Number Thomas H. Bindel
Construction and use of unit cell / crystal lattice models made from clear plastic boxes.
Bindel, Thomas H. J. Chem. Educ. 2002, 79, 468.
Crystals / Crystallography |
X-ray Crystallography |
Stoichiometry |
Molecular Modeling
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Cubic Unit Cell Construction Kit Bruce Mattson
This article provides plans for the construction of a student-interactive cubic unit cell model kit. Plans allow for the kit to be constructed on any scale. The kit is used in classroom activities or by students working alone or in small groups to construct the entire family of cubic lattices.
Mattson, Bruce. J. Chem. Educ. 2000, 77, 622.
Coordination Compounds |
Crystals / Crystallography |
Descriptive Chemistry |
Solid State Chemistry |
Molecular Modeling
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Ionic Crystals: A Simple and Safe Lecture Demonstration of the Preparation of NaI from Its Elements Zelek S. Herman
A simple and safe classroom demonstration showing the production of sodium iodide (NaI) crystals from elemental sodium and elemental (molecular) iodine is presented. The demonstration, which is quite impressive, naturally fits into the discussion of ionic bonding and the alkali halide crystals.
Herman, Zelek S. J. Chem. Educ. 2000, 77, 619.
Crystals / Crystallography |
Thermodynamics |
Ionic Bonding |
Crystals / Crystallography
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Kixium Monolayers: A Simple Alternative to the Bubble Raft Model for Close-Packed Spheres Keenan E. Dungey
This model focuses on the two-dimensional sheets, which are spontaneously formed from cereal pieces. The structure of the cereal rafts can be presented with an overhead projector.
Dungey, Keenan E. J. Chem. Educ. 2000, 77, 618.
Crystals / Crystallography |
Materials Science |
Solid State Chemistry
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An Inexpensive Kit for Constructing Models of Crystals Michael Laing
This simple kit comprises five trays, each of 25 square wells, and a lid. It can be used to construct primitive cubic, FCC, BCC, diamond, zinc blende, NaCl, CsCl, rutile, fluorite, perovskite structures. The trays are square tissue culture Petri dishes (multiwell plates). Atoms are represented by glass marbles.
Laing, Michael. J. Chem. Educ. 1997, 74, 795.
Crystals / Crystallography |
Materials Science |
Solid State Chemistry |
Molecular Properties / Structure
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Use of Pom Pons To Illustrate Cubic Crystal Structures Susan G. Cady
Transposing the textbook illustrations into three dimensional structures is difficult for some students. This transitions is easier if a three dimensional model is available for examination. Several 3D models are cited. A quick to assemble, inexpensive, colorful, and durable alternative to these models and styrofoam balls is the use of olefin pom pons.
Cady, Susan G. J. Chem. Educ. 1997, 74, 794.
Molecular Properties / Structure |
Crystals / Crystallography |
Molecular Modeling
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A Window on the Solid State William R. Robinson and Christopher P. Saari
Student tutorial and lecture demonstration software illustrating the structures and unit cells of metals.
Robinson, W. R. . J. Chem. Educ. 1995, 72, 814.
Metals |
Crystals / Crystallography |
Solid State Chemistry
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Mechanical Properties of Metals: Experiments with Steel, Copper, Tin, Zinc, and Soap Bubbles Geselbracht, Margaret J.; Ellis, Arthur B.; Penn, Rona L.; Lisensky, George C.; Stone, Donald S.
Annealing, hardening, and tempering of metals; using bubbles to model the crystalline structure of metals.
Geselbracht, Margaret J.; Ellis, Arthur B.; Penn, Rona L.; Lisensky, George C.; Stone, Donald S. J. Chem. Educ. 1994, 71, 254.
Physical Properties |
Metals |
Crystals / Crystallography
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The Caltech chemistry animation project Lewis, Nathan S.
Animations are being produced on subjects such as: atomic and molecular orbitals, lattices, VSPER, nucleophilic substitution, stereochemistry, sigma and pi bonding, and many more.
Lewis, Nathan S. J. Chem. Educ. 1993, 70, 739.
Stereochemistry |
Atomic Properties / Structure |
Molecular Modeling |
MO Theory |
Crystals / Crystallography
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Direct visualization of Bragg diffraction with a He-Ne laser and an ordered suspension of charged microspheres Spencer, Bertrand H.; Zare, Richard N.
Bragg diffraction from colloidal crystals proves to be an excellent teaching tool. Only modest equipment and lab skill are needed to produce a diffraction pattern to provide students with an in-depth understanding of what ordered structure is and how it can be probed by diffraction techniques.
Spencer, Bertrand H.; Zare, Richard N. J. Chem. Educ. 1991, 68, 97.
X-ray Crystallography |
Crystals / Crystallography |
Solids |
Lasers |
Materials Science
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Physical and chemical properties Boschmann, Erwin
A series of overhead demonstrations regarding physical and chemical properties.
Boschmann, Erwin J. Chem. Educ. 1987, 64, 891.
Physical Properties |
Liquids |
Precipitation / Solubility |
Magnetic Properties |
Kinetic-Molecular Theory |
Crystals / Crystallography |
Gases
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Allotropes and polymorphs Sharma, B. D.
Definitions and examples of allotropes and polymorphs.
Sharma, B. D. J. Chem. Educ. 1987, 64, 404.
Nomenclature / Units / Symbols |
Crystals / Crystallography |
Molecular Properties / Structure
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Crystal model kits for use in the general chemistry laboratory Kildahl, Nicholas K.; Berka, Ladislav, H.; Bodner, George M.
This paper describes dynamic crystal models which were developed independently at the Worcester Polytech institute and Purdue University.
Kildahl, Nicholas K.; Berka, Ladislav, H.; Bodner, George M. J. Chem. Educ. 1986, 63, 62.
Crystals / Crystallography |
Solids |
Solid State Chemistry
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Some simple AX and AX2 structures Wells, A. F.
Examines three of the simplest crystalline structures, that of sodium chloride, rutile, and fluorite.
Wells, A. F. J. Chem. Educ. 1982, 59, 630.
Molecular Properties / Structure |
Molecular Modeling |
Crystals / Crystallography
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A 3-dimensional animated videocassette on the unit cell Gelder, J. I.; Liu, C. F.; O'Donnell, T. J.
This 7.5 minute videocassette introduces the macroscopic properties of crystals as they relate to the regularity of the crystalline lattice and shows the relationship between the extended lattice and the cubic cell.
Gelder, J. I.; Liu, C. F.; O'Donnell, T. J. J. Chem. Educ. 1980, 57, 590.
Crystals / Crystallography
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A model to illustrate the infinite nature of a crystalline compound Kennard, C. H. L.
A model to illustrate the infinite and periodic nature of face-centered cubic crystalline compounds.
Kennard, C. H. L. J. Chem. Educ. 1979, 56, 238.
Molecular Modeling |
Crystals / Crystallography
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Some structural principles for introductory chemistry Wells, A. F.
Unit cells in repeating patterns and descriptions of simple structures.
Wells, A. F. J. Chem. Educ. 1977, 54, 273.
Solids |
Crystals / Crystallography
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Models for simple, close-packed crystal structures Mann, A. W.
This paper describes some simple crystallographic models made from styrofoam balls.
Mann, A. W. J. Chem. Educ. 1973, 50, 652.
Molecular Modeling |
Crystals / Crystallography |
Solids
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Crystal models Olsen, Robert C.
This short note illustrates a model designed to demonstrate the number of particles in a crystal that can be assigned to a unit cell.
Olsen, Robert C. J. Chem. Educ. 1967, 44, 728.
Crystals / Crystallography |
Molecular Modeling |
Solids |
Metals |
Metallic Bonding
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The teaching of crystal geometry in the introductory course Livingston, R. L.
It is the purpose of this paper to outline an approach to the teaching of crystal structure at the elementary level that will prepare the student for more advanced work in this field or that could be used as the beginning in a more advanced course.
Livingston, R. L. J. Chem. Educ. 1967, 44, 376.
Crystals / Crystallography |
Solids
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Some models of close packing Sime, Rodney J.
Presents models constructed from styrofoam balls and connected with toothpicks.
Sime, Rodney J. J. Chem. Educ. 1963, 40, 61.
Crystals / Crystallography |
Solids |
Molecular Modeling
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Standard ionic crystal structures Gehman, William G.
Examines the topics of cubic and hexagonal closest packed atom lattices; interstice lattices; standard crystal structures of type MaXb; standard CCP and HCP crystal structures; and deviations from ideal closest packing.
Gehman, William G. J. Chem. Educ. 1963, 40, 54.
Crystals / Crystallography |
Solids |
Molecular Modeling |
Solid State Chemistry
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Letters Fisher, D. Jerome
A spirited discussion regarding terminology for crystal classes.
Fisher, D. Jerome J. Chem. Educ. 1958, 35, 214.
Crystals / Crystallography |
Nomenclature / Units / Symbols
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Letters Donohue, Jerry
A spirited discussion regarding terminology for crystal classes.
Donohue, Jerry J. Chem. Educ. 1958, 35, 214.
Crystals / Crystallography |
Nomenclature / Units / Symbols
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Face-centered cube and cubical close-packing Barnett, E. De Barry
Instructions for the construction of simple models designed to illustrate the face-centered cube and cubical close-packing.
Barnett, E. De Barry J. Chem. Educ. 1958, 35, 186.
Crystals / Crystallography |
Solids
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A new type of crystal model Westbrook, J. H.; DeVries, R. C.
Describes the design and construction of a crystal model in which the positions of atoms are represented by colored lights that can be lit to illustrate various structures.
Westbrook, J. H.; DeVries, R. C. J. Chem. Educ. 1957, 34, 220.
Crystals / Crystallography |
Solids |
Molecular Modeling
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Some simple solid models Campbell, J. A.
Describes the use of hard spheres to illustrate a variety of concepts with respect solids, including closest packing and the effects of temperature and alloying.
Campbell, J. A. J. Chem. Educ. 1957, 34, 210.
Solids |
Crystals / Crystallography |
Molecular Modeling
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