Hibonite
Bermanec V, Holtstam D, Sturman D, Criddle A J, Back M E, Scavnicar S
The Canadian Mineralogist 34 (1996) 1287-1297
Nezilovite, a new member of the magnetoplumbite group, and the crystal
chemistry of mognetoplumbite and hibonite
_database_code_amcsd 0005520
5.613 5.613 22.285 90 90 120 P6_3/mmc
atom     x      y      z occ Biso
Ca     2/3    1/3    .25 .85  2.8
Ce     2/3    1/3    .25 .06  2.8
La     2/3    1/3    .25 .03  2.8
Nd     2/3    1/3    .25 .01  2.8
Mg     2/3    1/3    .25 .05  2.8
AlM1     0      0      0       .5
AlM2     0      0  .2379  .5  1.1
FeM3   1/3    2/3  .0271 .15   .7
MgM3   1/3    2/3  .0271 .24   .7
AlM3   1/3    2/3  .0271 .61   .7
SiM4   2/3    1/3 -.1889 .03   .8
TiM4   2/3    1/3 -.1889 .25   .8
AlM4   2/3    1/3 -.1889 .72   .8
AlM5 .1679  .3358 -.1071       .4
O1       0      0  .1481       .7
O2     1/3    2/3 -.0565       .8
O3    .362   .181    .75      2.3
O4   .1531  .3063  .0520      1.0
O5   .5043 -.5043  .3508       .9