Ecandrewsite
Mitchell R H, Liferovich R P
The Canadian Mineralogist 42 (2004) 1871-1880
The pyrophanite-ecandrewsite solid-solution: crystal structures
of the Mn1-xZnxSiO3 series (0.1 <= x <= 0.8)
Sample: x = .7, ilmenite structure
_database_code_amcsd 0005999
5.09472 5.09472 14.0302 90 90 120 R-3
atom      x      y      z  occ Biso
Mn        0      0 .36125   .3  1.0
Zn        0      0 .36125   .7  1.0
Ti        0      0 .14723        .5
O    .31994  .0280  .2438        .5