Majorite
Nakatsuka A, Yoshiasa A, Yamanaka T, Ohtaka O, Katsura T, Ito E
American Mineralogist 84 (1999) 1135-1143
Symmetry change of majorite solid-solution in the system Mg3Al2Si3O12-MgSiO3
Sample: x = .64
_database_code_amcsd 0002263
11.4891 11.4891 11.4891 90 90 90 *I4_1/acd
.5 .25 .125
atom       x       y       z  occ Biso
MgX1       0     .25    .125      1.48
MgX2  .12494       0     .25      1.46
MgY        0       0       0 .320  .33
AlY        0       0       0 .360  .33
SiY        0       0       0 .320  .33
SiZ1       0     .25    .375       .57
SiZ2  .37500       0     .25       .59
O1   -.03240  .05055  .15462      1.04
O2    .15446 -.03260  .05013      1.03
O3    .05023  .15470 -.03237       .99