Akhtenskite
Kondrashev Y D, Zaslavskii A I
Izvestiya Akademii Nauk SSSR 15 (1951) 179-186
The structure of the modifications of manganese oxide
_database_code_amcsd 0017794
2.786 2.786 4.412 90 90 120 P6_3mc
atom    x    y   z occ
Mn      0    0   0  .5
O     1/3  2/3 .25