Introduction: X-Ray Diffraction
integer) h,k,l mixed odd or even and if all even and h+k+l≠4n Primitive (P) Hexagonal Hexagonal closed packed metal All other cases h+2k=3n, l odd These rules are calculated based on atomic scattering factors (f) and structure factors (F), which we will discuss next class (you will also see them in HW4 and possibly on the final exam). class24/5
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Interstitial Sites (FCC & BCC) - University of North Texas
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Interstitial Sites (FCC & BCC)
lamma.engineering.unt.eduNaming Crystal Structures 9 •We define a structure type as a specific configuration of atoms. •Two materials have the same structure type if the atoms in the crystal structure have the same configuration and connectivity. The lattice parameters will …
Types of Lattices - University of North Texas
lamma.engineering.unt.edu•Notice that point 1 (½, ½, ½) at cube center and point 2 (0,0,0) at cube vertices have an identical 8-fold environment. The P-cubic lattice The extended F-cubic lattice The F-cubic lattice •This is a Bravais lattice because the 12-fold coordination of each lattice point is identical. 10
XRD Intensity Calculations - University of North Texas
lamma.engineering.unt.edu2 (Rutile ) 0.0 0.2 0.4 0.6 0.8 1.0 0 2 4 6 8 10 12 14 16 18 tor (f) sinT/O Ti+4 (f values from appendix 12) O-2 (f values from appendix 12) Ti+4 (f values interpolated for I 110 & I 001) O-2 (f values interpolated for I 110 & I 001)
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