Since there is no lab directly associated with my class, all of our visualization activities are done in a standard lecture room during one or more 50-minute class periods. I believe that it’s important to guide students as they explore 3D extended structures. CrystalMaker files on a computer (I have a license for my laptop).
static 3D models (generated by CrystalMaker).My experience is that the more representations students can master, the more likely they are to find one that helps them understand solid state structures. I’m interested in any tool that helps my students visualize solids. Science Skills, Practices, and ResourcesĪlthough I’m a solid state chemist, I still find it difficult to teach the visualization of solid state structures.Form bonds between Si and O by setting the search parameter to 2. Under the “edit” menu, select “bonding,” and press the “+” to add a new type of bond. First, lets create Si-O tetrahedra for easier viewing. The first structural feature we will investigate is the presence of the cyclosilicate motif.
Note, there are two water molecules (black spheres, Wa) present in this structure deselect them to remove them from view from the toolbar. All of the atoms shown are positioned within the unit cell verify that the stoichiometry of the mineral is correct. You should see the unit cell, the axis system, and the unit cell contents. Open the CrystalMaker entitled “beryl.cmdf” on your laptop. Let’s examine the structure of beryl in more detail. Impurities present, giving rise to the gemstones aquamarine (blue, Fe), emerald (green, Cr), and morganite (pink, Mn).
This work is licensed under the Creative Commons AttributionNonCommercial-NoDerivs CC BY-NC-ND. Johnson, Harvey Mudd College ( ) and posted on VIPEr on May 13, 2016.
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