For electron diffraction :

Use KXR = 6
(KXR is the code just after the wavelength)

and in replace of the atom name line :

Al+3O-2

by two lines per atom type  - 
first line the name, 
second line the parametrized scattering factors for electrons calculated by Jiang Jian-sheng 
as the a1, b1, a2, b2, a3, b3, a4, b4, c nine values :

Al
0.56914 1.10085 1.06080 6.73577 2.67657 29.0652 1.50965 90.5010 0.07005
O
0.24115 0.80966 0.66042 3.71987 0.79431 11.1230 0.25232 30.3521 0.03513


File example :

  Al2O3 R-3c  - electron diffraction
4.764 4.764 13.009 90.0 90.0 120.0
R -3 C
0.054056 6 2 2 1 0 3
Al
0.56914 1.10085 1.06080 6.73577 2.67657 29.0652 1.50965 90.5010 0.07005
O
0.24115 0.80966 0.66042 3.71987 0.79431 11.1230 0.25232 30.3521 0.03513
0
6.5 6.5
1.5 1.0 0.005
5000 40000 20000
10000 0.25 2 10
1 10
1 1
1.0 1 0
2. 3.


Compare with the analogous data for X-Ray :

  Al2O3 R-3c
4.764 4.764 13.009 90.0 90.0 120.0
R -3 C
1.54056 4 2 2 1 0 3
Al+3O-2
0
6.5 6.5
1.5 1.0 0.005
5000 40000 20000
10000 0.25 2 10
1 10
1 1
1.0 1 0
2. 3.
