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
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*Sodium Acetate Anhydrous (Get SDS download from Flinn Scientific here)
Test tube rack
Test tube holder
* Borax (SDS download here.)