Brownmillerite
Redhammer G J, Tippelt G, Roth G, Amthauer G
American Mineralogist 89 (2004) 405-420
Structural variations in the brownmillerite series Ca2(Fe2-xAlx)O5:
Single-crystal X-ray diffraction at 25 deg C and high temperature
X-ray powder diffraction (25 C <= T <= 1000 C)
Sample: bht120_6
Locality: synthetic
_database_code_amcsd 0003436
5.3569 14.5407 5.5735 90 90 90 I2mb
atom      x      y      z  occ  Uiso
Ca   .49115 .10854 .02705      .0076
FeM   .0006      0      0 .791 .0047
AlM   .0006      0      0 .209 .0047
FeT   .9528    .25 .92900 .420 .0043
AlT   .9528    .25 .92900 .580 .0043
O1    .2494 .98611  .2530      .0074
O2    .0228 .14334  .0691      .0101
O3    .6135    .25  .8640      .0083