UNIT CELLS AND CRYSTAL STRUCTURES
In this module students create a saturated solutions using Borax and sodium acetate. Upon drying, each crystal will have a different shape. The shape at the macro level is driven by the arrangement of atoms. This repeating arrangement of atoms – which defines a crystal structure – is the unit cell. Students may introduce other chemicals to change the resulting structure. This modules serves as a good introduction to crystal structures supplementing the typical ball and stick models.
Module Resources and Documents
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Module Alignment to Next Generation Science Standards (NGSS) & Common Core State Standards (CCSS)
NGSS Alignments Unit Cells and Crystal Structure
List of Required Materials
Most necessary classroom materials for the experiment connected to this module are available to educators at no cost until May 1, 2020. A user account is required to download material and request supplies: simply fill in all the profile fields on your Profile. The full list of items needed for this module is below. Those available through Nano-Link until May 1, 2020 are marked with an asterisk.
*Sodium Acetate Anhydrous (Get SDS download from Flinn Scientific here)
Test tube rack
Test tube holder
* Borax (SDS download here.)