#Silicon Nitride, beta-Si3N4
#Hexagonal, P6 3 /m (176), Z = 2. The structure was determined by Hardie and Jack [1957]
#and confirmed by Borgen and Seip [1961].
#Lattice constants of this sample
#a = 7.6044(2)A, c = 2.9075(1)
#c/a = 0.3823
#Volume 145.61 A 3
6.583
3.800
3.293
2.660
2.489
2.310
2.1939
2.1797
1.9013
1.8916
1.8275
1.7525
1.5911
1.5467
1.5108
1.4534
1.4368
1.4325
1.4197
1.3579
1.3408
1.3299
1.3173
1.2883
1.2675