c/a ratio of an ideal HCP crystal

Lecture 19 of 50 in Materials Science by Introduction to Materials Science and Engineering. 11 min. Watch on YouTube

Course: Materials Science (Engineering). Covers: crystal structure defects phase diagrams mechanical properties.

All lectures in Materials Science

  1. 1.1 Introduction · 13 min
  2. 1.2 Crystal geometry · 16 min
  3. 1.3 Unit cell · 25 min
  4. 1.4 Classification of latices · 23 min
  5. 1.5 Gaps in Bravais lattices · 23 min
  6. Symmetry I · 24 min
  7. Symmetry II · 15 min
  8. Classification of lattices on the basis of symmetry · 18 min
  9. A symmetry based approach to Bravais lattices · 26 min
  10. Miller Indices of Directions · 18 min
  11. Miller Indices for Planes · 18 min
  12. Miller Indices for a plane and its normal in Cubic Crystal · 2 min
  13. Weiss Zone law and its applications · 27 min
  14. Inter-planar spacing · 16 min
  15. Bragg’s Law · 18 min
  16. 16: Close-packing of Hard Spheres · 21 min
  17. 17 ABAB stacking: Hexagonal Close-Packed (HCP) structure · 20 min
  18. Lattice and motif of HCP crystals · 27 min
  19. c/a ratio of an ideal HCP crystal · 11 min
  20. ABCABC stacking: Cubic Close-packing (CCP) · 23 min
  21. Voids in close-packed structures · 52 min
  22. Solid solutions I · 20 min
  23. Solid solutions II · 20 min
  24. Hume-Rothery rules · 33 min
  25. Ordered and Disordered Solid Solutions · 24 min
  26. Graphene · 8 min
  27. Structure of graphite · 17 min
  28. Structure of diamond · 32 min
  29. Carbon Nanotubes (CNT) · 42 min
  30. Buckminsterfullerene (C60) · 15 min
  31. Ionic solids · 34 min
  32. NaCl · 10 min
  33. CsCl · 5 min
  34. ZnS · 7 min
  35. BCC vs CsCl · 3 min
  36. Amorphous Solids · 20 min
  37. Polymers · 14 min
  38. Vinyl Polymers · 3 min
  39. Thermoplasts and Thermosets · 12 min
  40. Tacticity · 6 min
  41. Copolymers · 4 min
  42. Crystallinity in Polymers · 13 min
  43. Defects in Crystals · 8 min
  44. Vacancies · 38 min
  45. Edge dislocation: Half plane · 10 min
  46. Edge dislocation: Slip · 12 min
  47. Characteristic vectors of a dislocation · 11 min
  48. Edge, screw and mixed dislocations · 10 min
  49. Screw dislocations · 14 min
  50. Burgers circuit · 14 min