Sellaite
Wyckoff R W G
Crystal Structures 1 (1963) 239-444
Second edition. Interscience Publishers, New York, New York
Rutile structure
_database_code_amcsd 0011754
4.623 4.623 3.052 90 90 90 P4_2/mnm
atom    x    y z
Mg      0    0 0
F    .303 .303 0