% data from G.Dolling's 1963 paper ("Lattice Vibrations in Crystals
% with the Diamond Structure") at the Symposium of Inelastic Scattering
% of Neutrons in Solids and Liquids, Dewey call number 539.7213.S989
% k*a/pi     TO   err    LO   err   TA   err    LA   err  [THz]
 0  0  0   15.53  .23  15.53  .23  0.00  .00   0.00  .00
.2  0  0   15.40  .36  15.55  .38  2.00  .08   3.20  .12
.4  0  0   14.65  .33  15.15  .35  3.45  .06   6.10  .15
.6  0  0   14.18  .35  14.60  .35  4.27  .10   8.50  .20
.8  0  0   13.95  .34  13.60  .27  4.46  .07  10.60  .20
1   0  0   13.90  .30  12.32  .20  4.49  .06  12.32  .20

0 .85 .85  14.20  .34  11.70  .30  5.60  .11  11.70  .30
0 .75 .75  14.40  .38  11.15  .30  6.56  .14  10.85  .30
0 .6  .6   14.50  .40  11.85  .30  6.70  .20   9.55  .30  % read off plot 
0 .5  .5   14.55  .38  12.83  .27  6.06  .12   8.60  .18
0 .4  .4   14.80  .40  13.87  .28  5.11  .09   7.60  .20
0 .3  .3   15.00  .40  14.40  .30  4.10  .20   6.15  .20  % read off plot 
0 .2  .2   15.10  .35  15.10  .35  2.91  .07   4.55  .10

0  0  0    15.53  .23  15.53  .23  0.00  .00   0.00  .00
.1 .1 .1   15.40  .37  15.45  .35  1.53  .03   3.00  .13
.2 .2 .2   15.10  .30  14.78  .30  2.62  .05   5.60  .15
.3 .3 .3   14.83  .30  14.13  .30  3.22  .05   8.03  .15
.4 .4 .4   14.78  .27  13.30  .22  3.41  .05  10.12  .20
.5 .5 .5   14.68  .30  12.60  .32  3.43  .05  11.35  .30