mseasuslides: muddiest point: unit cell calculations slide set
DESCRIPTION
This slide set corresponds to the MaterialsConcepts YouTube video "Muddiest Point- Unit Cell Calculations". Here's the link: http://www.youtube.com/watch?v=lIVVUHo471Q To study the vocab used in this video, visit this site: http://quizlet.com/21414803/21-crystal-structure-i-unit-cells-flash-cards/ This work was supported by NSF Grants #0836041 and #1226325.TRANSCRIPT
Muddiest Points – Unit Cell
Muddiest Point 1: “Figuring how to find the properties of atoms (FD,BD,APF etc) Just a lot if info at once.”
Muddiest Point 2: “I am very confused on the last activity. I have no idea what just happened.”
Muddiest Point 3: “The calculations related to unit cells, APF,F a/e/ length etc.”
Features of FCC
# atoms faces, corners = # atoms / UC =
# =____ ____ At / UC__________
Atoms touch along direction? ______________
# atomic radii along touch direction within UC? # R = ______
Cube edge (lattice constant) ao = f (R) a = _________
Length FD = f (R) FD = _______
Length BD = f (R) BD = _______
Cube volume V = f(R) V / UC = ________
Atomic Packing Factor = Vol atoms / Vol UC APF =______
Coordination Number = # of atoms touching one atom CN =_______
#corner atoms?
#face atoms?
# body atoms?
Atoms touch along direc7on?
Real Gold
2
Atomic Packing Factor (APF)
APF = (vol atoms/UC) / (vol UC)
Crystal Spatial Visualization Survey
ClassID#:
PLEASE COMPLETE OTHER SIDE ALSO
Finding a (Unit Cell Edge) in terms of R
Finding the Body Diagonal in terms of R