Pyrophanite
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 = .1, ilmenite structure
_database_code_amcsd 0005996
5.13058 5.13058 14.2465 90 90 120 R-3
atom      x      y      z  occ Biso
Mn        0      0 .36031   .9   .5
Zn        0      0 .36031   .1   .5
Ti        0      0 .14820        .3
O     .3205  .0313  .2437        .4