Arsenic
Wyckoff R W G
Crystal Structures 1 (1963) 7-83
Second edition. Interscience Publishers, New York, New York
_database_code_amcsd 0011252
4.131 4.131 4.131 54.167 54.167 54.167 R-3m
atom    x    y    z
As   .226 .226 .226