Nierite
Yang P, Fun H-K, Rahman I A, Saleh M I
Ceramics International 21 (1995) 137-142
Two phase refinements of the structures of a-Si3N4 and B-Si3N4 made from rice
husk by Rietveld analysis
Locality: synthetic
Sample: Alpha phase
Note: changed N4 location to match reported bond distances
_database_code_amcsd 0012185
7.7650 7.7650 5.6275 90 90 120 P31c
atom     x      y      z Biso
Si1  .5106  .0815  .1904  .73
Si2  .1658  .2520 -.0168  .54
N1       0      0  -.029  .26
N2     1/3    2/3   .634   .3
N3   .3488 -.0383  -.022   .8
N4   .3092  .3546   .230   .1