Structural Models for the Sodium Chloride Structure

Material Cellulose spheres (white 30 mm and red 12 mm), glue, cardboard, Gummy candy (two different colors), toothpicks. 

Procedure and Observation (a) Add white spheres on the triangular layer in the cubic closest packing (see E5.3), find the shape of both interstitial sites octahedral and tetrahedral gaps, (b) Completely fill the octahedral sites with the 

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