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Si3N4 model building

Biuld-Biuld Crystals-Biuld crystals:Enter group,P63/m;Lattice parameters:a=.. c=...;click build; first step ok!
Second step:Build-add atoms:add the atom site: x,y,z.;the all OK!
4Â¥2007-08-19 11:36:58
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*data for   ICSD #35568
Coll Code   35568
Rec  Date   1983/12/31
Chem Name   Silicon Nitride - Beta
Structured  Si3 N4
Sum         N4 Si3
ANX         A3X4
D(calc)     3.18
Title       Modifications structurales du nitrure de silicium en fonction de la
            temperature
Author(s)   Billy, M.;Labbe, J.C.;Selvaraj, A.;Roult, G.
Reference   Materials Research Bulletin
            (1983), 18, 921-934
Unit Cell   7.6170(4) 7.6170(4) 2.9134(2) 90. 90. 120.
Vol         146.39
Z           2
Space Group P 63/m
SG Number   176
Cryst Sys   hexagonal
Pearson     hP14
Wyckoff     h2 c
Red Cell    P  2.913 7.617 7.617 120 90 90 146.386
Trans Red   0.000 0.000 1.000 / 1.000 0.000 0.000 / 0.000 1.000 0.000
Comments    Neutron diffraction (powder)
            Temperature in Kelvin: 573
            No R value given in the paper.
            At least one temperature factor missing in the paper.
Atom  #   OX   SITE      x           y           z           SOF      H
N    1  -3    2 c   0.3333      0.6667      0.25           1.         0   
N    2  -3    6 h   0.3359      0.0328      0.25           1.         0   
Si   1  +4    6 h   0.1784      0.7749      0.25           1.         0   
*end for    ICSD #35568
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Biuld-Biuld Crystals-Biuld crystals:Enter group,P63/m;Lattice parameters:a=.. c=...;click build; first step ok!
Second step:Build-add atoms:add the atom site: x,y,z.;the all OK!

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