Investigating the Lattice Structure of Monocrystales 0519046 JI Fei 季镄

Laue Condition h,k,l are Laue indices

Laue Condition

Bragg Condition

A is the amplitude of scattered wave Crystal Structure A is the amplitude of scattered wave

Laue Diagram

(LEYBOLD Physics Leaflets P7.1.2.2) Evaluation Fig.9 Laue diagram at LiF (LEYBOLD Physics Leaflets P7.1.2.2)

Evaluation Xq/mm Yq/mm Zq*/mm h k l X*/mm Y*/mm 21.5 0.0 11.6 4 2 18.7 2 18.7 -20.0 10.4 -4 -18.7 -19.5 10.0 h k l d/pm θ λ 3 1 92.4 13.3 42.5 6 2 60.7 17.5 36.5 63.7 18.4 40.2 4 67.1 19.5 44.8 82.2 24.1 90.1 26.6 80.7 Tab. 1: Co-ordinates and Miller indices of the reflections in the Laue diagram of LiF (*: calculated) Tab. 2: Spacing of lattice planes d, Bragg angle an dwavelength associated with the sets of lattice LiF, a0=402.80 pm

Evaluation (h, k, l) a) b)

Evaluation (h, k, l) h, k, l λ 4, 0, 2 80.7 8, 0, 4 40.3 h k l d/pm 3 Tab. 2: Spacing of lattice planes d, Bragg angle and wavelength associated with the sets of lattice LiF, a0=402.80 pm h k l d/pm 3 1 92.4 13.3 42.5 6 2 60.7 17.5 36.5 63.7 18.4 40.2 4 67.1 19.5 44.8 82.2 24.1 90.1 26.6 80.7 4, 0, 2 80.7 8, 0, 4 40.3