GaAs: Si 5.5x1018/cm3 at RT, measured by H. Yao.  
EV
E1E2
4.9994  -6.03   20.544
4.94951 -5.819  21.926
4.89866 -4.834  23.408
4.84885 -3.207  24.131
4.79819 -1.492  24.549
4.74857 0.052   24.61
4.69819 1.638   24.413
4.64886 3.165   24.094
4.59886 4.532   23.591
4.54825 5.897   22.918
4.49874 7.039   22.123
4.4487  8.333   21.056
4.3982  9.092   19.699
4.34883 9.571   18.47
4.29907 9.723   17.354
4.24898 9.581   16.368
4.19862 9.465   15.669
4.14805 9.336   15.068
4.09868 9.177   14.586
4.04916 8.892   14.186
3.99952 8.777   13.972
3.94983 8.61    13.782
3.90013 8.449   13.653
3.85047 8.243   13.55
3.80089 8.174   13.582
3.75144 8.1 13.626
3.70105 7.98    13.64
3.65092 7.985   13.833
3.60108 7.905   13.951
3.55157 7.916   14.217
3.50142 8.03    14.501
3.4517  8.022   14.893
3.40151 8.273   15.346
3.35186 8.425   15.838
3.30187 8.912   16.528
3.25164 9.464   17.294
3.20127 10.28   18.073
3.15163 11.62   18.88
3.10196 13.547  19.147
3.05232 15.797  18.486
3.00206 17.05   17.704
2.95203 18.219  17.486
2.90227 20.512  16.641
2.8522  22.621  14.099
2.80192 22.973  11.148
2.75217 22.34   8.99
2.70238 21.378  7.476
2.65266 20.61   6.291
2.60254 19.802  5.525
2.55271 19.13   4.907
2.50273 18.63   4.311
2.45272 18.101  3.876
2.40281 17.635  3.539
2.35266 17.213  3.24
2.30285 16.796  3.077
2.25305 16.44   2.854
2.20301 16.168  2.594
2.15289 15.881  2.407
2.10287 15.635  2.244
2.05273 15.388  2.203
2.00267 15.211  1.952
1.95252 15.013  1.766
1.90249 14.794  1.704
1.85246 14.608  1.582
1.80237 14.493  1.351
1.75244 14.353  1.318
1.70239 14.277  1.043
1.65247 14.195  0.804
1.6025  13.996  0.538
1.55253 13.819  0.273
1.50249 13.325  0.165