HON 225 Graded Lab Activity (50 points) Name __________________________________ Crystal Structure REPORT SHEET Procedure 1. Simple cubic lattice 1. Edge length of unit cell __________________ 2. Total volume of unit cell __________________ 3. Fraction of sphere per each of 8 unit cells __________________ 4. Spheres per unit cell __________________ 5. Volume of sphere(s) (occupied volume of unit cell) __________________ 6. Empty volume of unit cell __________________ 7. a. Percent occupied space __________________ b. Percent empty space __________________ 8. Coordination number __________________ Procedure 2. Body-centered cubic lattice 1. Body diagonal length of unit cell __________________ 2. Edge length of unit cell __________________ 3. Total volume of unit cell __________________ 4. Spheres per unit cell __________________ 5. Occupied volume of unit cell __________________ 6. Empty volume of unit cell __________________ 7. a. Percent occupied space __________________ b. Percent empty space __________________ 8. Coordination number __________________Procedure 3. Face-centered cubic lattice (cubic close packing) 1. Total volume of unit cell __________________ 2. Spheres per unit cell __________________ 3. Occupied volume of unit cell __________________ 4. Empty volume of unit cell __________________ 5. a. Percent occupied space __________________ b. Percent empty space __________________ 6. Coordination number __________________ Procedure 4: Empty volume determination of aluminum 1. Occupied volume of the sample __________________ 2. a. Percent empty space in Al sample __________________ b. Theoretical percent empty space for fcc lattice