Institute of Experimental Mineralogy
                 Russian Academy of Sciences
     -------------------------------------------------
           142432, Chernogolovka, Moscow district
             A.V. Chichagov  +7(496)52-22320

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          ***      W W W - X R A Y P O L       ***
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TREVORITE

3, td-spinel invers, syn, f-oxospinelides, sf-spinel, s-magnetite, DF

(Ni,Fe)Fe(2)O(4)


Cubic  F d3m  Z = 8

Fd3m

29 .1 .15

Ref.Str.:

         Blesa M.C., Amador U., Moran E., Menendez N., Tornero J.D.,

         Rodriguez-Carvajal J. (1993) * Solid State Ionics, 63 429-436

         L: $Ni1.43 Fe1.7 O4$

         R: N.A.D.

                   Initial data from BDM-file 

   Lattice parameters (cub. angs.,degr.):

             a =   8.3473   alpha =   90.0 
             b =   8.3473   beta  =   90.0 
             c =   8.3473   gamma =   90.0 

    Unit cell volume (cub. angs.) =   581.62

    Molar volume ( cub.cm/mol.) =    43.79

  Co-ordinates, thermal parameters, occupation for atomic positions:

NoP   x/a     y/b     z/c    B(j)   atom  / occupation

   1 0.625   0.625   0.625    0.0    Fe    = 0.41, Ni    = 0.6 
   2 0.0     0.0     0.0      0.0    Fe    = 0.89, Fe    = 0.0 
   3 0.125   0.125   0.125    0.0    Ni    = 0.12, Ni    = 0.0 
   4 0.3798  0.3798  0.3798   0.0    O     = 1.00


  Co-ordinates for all atomic positions :

   No       NoP      x/a        y/b       z/c 

     1       1     0.625      0.625      0.625 
     2       2     0.0        0.0        0.0   
     3       3     0.125      0.125      0.125 
     4       4     0.3798     0.3798     0.3798
     5       1     0.125      0.375      0.875 
     6       1     0.375      0.875      0.125 
     7       1     0.875      0.125      0.375 
     8       2     0.75       0.75       0.25  
     9       2     0.0        0.5        0.5   
    10       2     0.25       0.75       0.75  
    11       3     0.625      0.875      0.375 
    12       3     0.875      0.375      0.625 
    13       3     0.375      0.625      0.875 
    14       4     0.3702     0.1298     0.6298
    15       4     0.6202     0.1202     0.8798
    16       4     0.6298     0.3702     0.1298
    17       1     0.125      0.875      0.375 
    18       1     0.875      0.375      0.125 
    19       1     0.375      0.125      0.875 
    20       2     0.75       0.25       0.75  
    21       2     0.5        0.0        0.5   
    22       3     0.625      0.375      0.875 
    23       3     0.375      0.875      0.625 
    24       3     0.875      0.625      0.375 
    25       4     0.3702     0.6298     0.1298
    26       4     0.1202     0.6202     0.8798
    27       4     0.1298     0.3702     0.6298
    28       1     0.375      0.375      0.625 
    29       1     0.375      0.625      0.375 
    30       1     0.125      0.625      0.125 
    31       1     0.875      0.625      0.875 
    32       1     0.125      0.125      0.625 
    33       1     0.625      0.375      0.375 
    34       1     0.625      0.125      0.125 
    35       1     0.625      0.875      0.875 
    36       1     0.875      0.875      0.625 
    37       2     0.25       0.25       0.25  
    38       2     0.5        0.5        0.0   
    39       3     0.875      0.875      0.125 
    40       3     0.875      0.125      0.875 
    41       3     0.625      0.125      0.625 
    42       3     0.375      0.125      0.375 
    43       3     0.625      0.625      0.125 
    44       3     0.125      0.875      0.875 
    45       3     0.125      0.625      0.625 
    46       3     0.125      0.375      0.375 
    47       3     0.375      0.375      0.125 
    48       4     0.6202     0.6202     0.3798
    49       4     0.1298     0.8702     0.1298
    50       4     0.8798     0.3798     0.8798
    51       4     0.6298     0.8702     0.6298
    52       4     0.8798     0.8798     0.3798
    53       4     0.8702     0.1298     0.1298
    54       4     0.3798     0.8798     0.8798
    55       4     0.8702     0.6298     0.6298
    56       4     0.1202     0.1202     0.3798
    57       4     0.3798     0.6202     0.6202
    58       4     0.6202     0.3798     0.6202
    59       4     0.1298     0.6298     0.3702
    60       4     0.8702     0.3702     0.3702
    61       4     0.1202     0.3798     0.1202
    62       4     0.8798     0.6202     0.1202
    63       4     0.3702     0.3702     0.8702
    64       4     0.6298     0.6298     0.8702
    65       4     0.6202     0.8798     0.1202
    66       4     0.3798     0.1202     0.1202
    67       4     0.3702     0.8702     0.3702
    68       4     0.6298     0.1298     0.3702
    69       4     0.8702     0.8702     0.8702
    70       4     0.1298     0.1298     0.8702
    71       4     0.8798     0.1202     0.6202
    72       4     0.1202     0.8798     0.6202


X-ray density (g/cm cub.)   =      5.55

MU (1/cm) =     275.588    Mass attenuation coefficient (cm**2/g) =     49.695

 Selected interatomic distances (cation-anion,anion-anion):

 NoP    Atom              Rad.sph.      C.N.    Distance     NoP N.
                           (angs.)               (angs.)

    1   Fe   ,Ni             2.592        6
                                                 2.0475       4
                                                 2.0475       4
                                                 2.0475       4
                                                 2.0475       4
                                                 2.0475       4
                                                 2.0475       4
    2   Fe   ,Fe             2.592        4
                                                 1.8766       4
                                                 1.8766       4
                                                 1.8766       4
                                                 1.8766       4
    3   Ni   ,Ni             2.52         6
                                                 2.1276       4
                                                 2.1276       4
                                                 2.1276       4
                                                 2.1276       4
                                                 2.1276       4
                                                 2.1276       4
    4    O                   3.264       12
                                                 2.9523       4
                                                 2.9523       4
                                                 2.9523       4
                                                 2.9523       4
                                                 2.8379       4
                                                 3.0645       4
                                                 2.8379       4
                                                 2.8379       4
                                                 2.9523       4
                                                 3.0645       4
                                                 3.0645       4
                                                 2.9523       4

  X-ray diffraction powder data (II),  X-Ray W.L. =   1.78892(angs.):

  No   H   K   L   Theta 2*Theta    S       LPG   MF        F          I int.
                    ( degree )                                         *100

    1   1   1   1 10.696  21.392   0.104   55.16    8       65.7      563.8
    2   2   2   0 17.643  35.286   0.169   19.04   12      151.1     1540.9
    3   1   1   3 20.818  41.635   0.199   13.2    24      247.8     5752.7
    4   2   2   2 21.79   43.579   0.207   11.92    8      203.6     1168.1
    5   4   0   0 25.38   50.76    0.24     8.44    6      383.4     2199.1
    6   3   3   1 27.845  55.69    0.261    6.83   24       32.7       51.7
    7   4   2   0 28.634  57.268   0.268    6.41   24        0.0        0.0
    8   2   2   4 31.665  63.33    0.293    5.12   24      120.2      525.4
    9   1   1   5 33.835  67.669   0.311    4.44   24      218.6     1506.3
   10   3   3   3 33.835  67.669   0.311    4.44    8      188.3      372.7
   11   4   4   0 37.313  74.625   0.339    3.66   12      525.0     3580.8
   12   5   3   1 39.341  78.683   0.354    3.34   48       42.2       84.5
   13   4   4   2 40.011  80.022   0.359    3.25   24        1.6        0.1
   14   6   2   0 42.665  85.33    0.379    2.98   24      101.5      217.8
   15   3   3   5 44.641  89.283   0.393    2.85   24      174.7      616.4


  X-ray diffraction powder data (I)...X-Ray wave length =  1.78892 (angs.):

  No   H   K   L   Theta 2*Theta    d           I int   I int.n.  I p.h.n.   H(Si)
                    ( degree )   (angstrem)     *100                         *100

    1   1   1   1  10.696  21.392  4.81932      563.8      9.8     10.0     5.6
    2   2   2   0  17.643  35.286  2.95122     1540.9     26.8     27.0     5.7
    3   1   1   3  20.818  41.635  2.51681     5752.7    100.0    100.0     5.7
    4   2   2   2  21.79   43.579  2.40966     1168.1     20.3     20.3     5.7
    5   4   0   0  25.38   50.76   2.08682     2199.1     38.2     37.8     5.8
    6   2   2   4  31.665  63.33   1.70389      525.4      9.1      8.9     5.9
    7   1   1   5  33.835  67.669  1.60644     1879.1     32.7     31.5     5.9
    8   4   4   0  37.313  74.625  1.47561     3580.8     62.2     59.3     6.0
    9   5   3   1  39.341  78.683  1.41095       84.5      1.5      1.4     6.0
   10   6   2   0  42.665  85.33   1.31982      217.8      3.8      3.5     6.1
   11   3   3   5  44.641  89.283  1.27295      616.4     10.7      9.9     6.2

Reference:
Chichagov A.V. et al.
Information-Calculating System on Crystal Structure Data of Minerals
(MINCRYST)
- Kristallographiya, v.35, n.3, 1990, p.610-616 (in Russian)