INTRODUCTION , CRYSTALS, LD,LPD,PD, PPD, APF, DENSITY CALCULATION

1. DEVAPRAKASAM DEIVASAGAYAM
Professor of Mechanical Engineering
Room:11, LW, 2nd Floor
School of Mechanical and Building Sciences
Email: devaprakasam.d@vit.ac.in, dr.devaprakasam@gmail.com
MEE1005: Materials Engineering and Technology (3:0:0:3)
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

2. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

3. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

4. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

5. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

6. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

7. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

8. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

9. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

10. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

11. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

12. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

13. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

14. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

15. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

16. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

17. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

18. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

19. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

20. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

21. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
 = mass/volume
= (atoms in the unit cell, n ) x
(mass of an atom, M) /
(the volume of the cell, Vc)
Density Computations
Atoms in the unit cell, n = 4 (FCC)
Mass of an atom, M = A/NA
A = Atomic weight (amu or g/mol)
Avogadro number NA = 6.023  1023 atoms/mol
The volume of the cell, Vc = a3 (FCC)
a = 2R2 (FCC)
R = atomic radius
Ac NV
nA


22. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
Density of a crystalline material,
 = density of the unit cell
= (atoms in the unit cell, n )  (mass of an atom, M) / (the volume of
the cell, Vc)
Density Computations Summarized
Atoms in unit cell, n = 2 (BCC); 4 (FCC); 6 (HCP)
Mass of atom, M = Atomic weight, A, in amu (or g/mol). Translate
mass from amu to grams divide atomic weight in amu by Avogadro
number
NA = 6.023  1023 atoms/mol
Volume of the cell, Vc = a3 (FCC and BCC)
a = 2R2 (FCC); a = 4R/3 (BCC)
where R is the atomic radius AcNV
nA
