CaHI Wyckoff R W G Crystal Structures 1 (1963) 294-296 Second edition. Interscience Publishers, New York, New York Note: tetragonal PbFCl structure _database_code_amcsd 0011846 4.071 4.071 8.941 90 90 90 P4/nmm atom x y z Ca 0 .5 .16 H 0 0 0 I 0 .5 .675