Crossword puzzle

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Across
  1. 3. ....displaced ion from lattice
  2. 4. ...cubic lattice point situated only at corner
  3. 6. ratio of volume and unit cell
  4. 7. pattern arrangement of atom
  5. 10. impurity small sized atom occupy void space
  6. 13. ....defect one anion and one cation vacancy
  7. 14. ...cell minimum area cell in two dimension
Down
  1. 1. ....indices are used to specify direction
  2. 2. science of crystal
  3. 5. ability to cut the another material
  4. 8. axial relatioship and interaxial angles are equal
  5. 9. ...defect is a one dimensional defect
  6. 11. ....missing atom within crystal
  7. 12. ...law state that stress is directly proportional to strain
  8. 15. ....boundaries is a surface imperfection