Strontium
Wyckoff R W G
Crystal Structures 1 (1963) 7-83
Second edition. Interscience Publishers, New York, New York
Sample at T = 521 K
Hexagonal closest packed, hcp, structure, known as the beta phase
_database_code_amcsd 0011193
4.32 4.32 7.06 90 90 120 P6_3/mmc
atom   x   y   z
Sr   1/3 2/3 .25