COL  ICSD Collection Code 60195
 DATE Recorded Dec 3, 1986; updated Jan 19, 1999
 NAME Iron nitride (4/1) - gamma
 MINR Roaldite - synthetic
 FORM Fe4 N
      = Fe4 N
 TITL Binary and ternary interstitial alloys I. The iron-nitrogen 
      system: the structures of Fe4 N and Fe2 N
 REF  Proceedings of the Royal Society of London, Series A: Mathematical 
      and Physical Sciences (76,1906-)
      PRLAA 195 (1948) 34-40
 AUT  Jack K H
 CELL a=3.795 b=3.795 c=3.795 à=90.0 á=90.0 ç=90.0
      V=54.7 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    1a  0.      0.      0.
      Fe     2  0.000    3c  1/2     1/2     0.
      N      1  0.000    1b  1/2     1/2     1/2
 WYCK c b a
 REM  K 12a6 - structure
 REM  M PDF 6-627
 TEST Calculated density unusual but tolerable. (Code 23)
 TEST No R value given in the paper. (Code 51)
 TEST At least one temperature factor missing in the paper. (Code 53)