COL  ICSD Collection Code 79980
 DATE Recorded Oct 14, 1996; updated Jan 19, 1999
 NAME Iron nitride (4/1) - gamma'
 MINR Roaldite - synthetic
 FORM Fe4 N
      = Fe4 N
 TITL Structure determination of gamma'-(Fe4 N) and epsilon-(Fe3 N)
 REF  Journal of Alloys Compd.
      JALCE 227 (1995) 10-17
 AUT  Jacobs H, Rechenbach˙D, Zachwieja˙U
 CELL a=3.790 b=3.790 c=3.790 à=90.0 á=90.0 ç=90.0
      V=54.4 D=7.10 Z=1
 SGR  P m -3 m      (221) - cubic
 CLAS m-3m  (Hermann-Mauguin) - Oh  (Schoenflies)
 PRS  cP5
 ANX  NO4
 PARM Atom__No OxStat  Wyck ---X--- ---Y--- ---Z---  -SOF-
      Fe     1  0.000    3d  1/2     0.      0.
      Fe     2  0.000    1b  1/2     1/2     1/2
      N      1  0.000    1a  0.      0.      0.
 WYCK d b a
˙
 TF   Atom   U(1,1)  U(2,2)  U(3,3)  U(1,2)  U(1,3)  U(2,3)
      Fe 1    0.0049  0.0095  0.0095  0.0000  0.0000  0.0000
      Fe 2    0.0047  0.0047  0.0047  0.0000  0.0000  0.0000
      N  1    0.0050  0.0050  0.0050  0.0000  0.0000  0.0000
 REM  M PDF 6-627
 RVAL 0.017
 TEST Calculated density unusual but tolerable. (Code 23)