/* thermal conductivity of Silicon from Graves, see Physical Review, Vol. 167(3), pp. 765-82, 1968
/* T(K), thermal conductivity (W/cm-K)
100 7.52
150 3.88
200 2.44
250 1.78
300 1.40
350 1.15
400 .939
450 .825
500 .736
550 .663
600 .604
650 .555
700 .500