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: bht55_1
Locality: synthetic
_database_code_amcsd 0003433
5.3808 14.6131 5.5911 90 90 90 I2mb
atom      x      y      z  occ  Uiso
Ca   .49099 .10817 .02643      .0064
FeM  .00101      0      0 .862 .0032
AlM  .00101      0      0 .138 .0032
FeT   .9526    .25  .9299 .586 .0027
AlT   .9526    .25  .9299 .414 .0027
O1    .2500  .9858  .2532      .0061
O2    .0247  .1427  .0699      .0089
O3    .6097    .25  .8685      .0074