This technique is called Convergent Beam Electron Diffraction ( CBED ) and can reveal the full three-dimensional symmetry of the crystal.
32.
In addition to electron microscopy images, it is also possible to use electron diffraction ( ED ) patterns for crystal structure determination.
33.
A consequence of this is that the radius of the Ewald sphere is much larger in electron diffraction experiments than in X-ray diffraction.
34.
Lattice parameters of high accuracy can in fact be obtained from electron diffraction, relative errors less than 0.1 % have been demonstrated.
35.
Structure factor amplitudes from electron diffraction data are far less reliable than their counterparts from X-ray single-crystal and powder diffraction data.
36.
Precession electron diffraction is typically conducted using accelerating voltages between 100-400 kV . Patterns can be formed under parallel or convergent beam conditions.
37.
In the summer of 1930, Pauling made another European trip, during which he learned about gas-phase electron diffraction from Herman Francis Mark.
38.
However, recent studies using x-ray and electron diffraction have been able to identify compositional differences that separate one type of whitlockite from another.
39.
The structure of HMn ( CO ) 5 has been studied by many methods including X-Ray diffraction, neutron diffraction, and electron diffraction.
40.
Figures 22a and b present HRTEM lattice images and electron diffraction patterns taken along the [ 0001 ] and [ 110 ] crystalline directions, respectively.
