Al F4 Rb Bulou A, Nouet J Journal of Physics C: Solid State Physics 15 (1982) 183-196 Structural phase transitions in ferroelastic RbAlF4: I. DSC, X-ray powder diffraction investigations and neutron powder profile refinement of the structures _cod_database_code 1000457 _database_code_amcsd 0013172 7.2124 7.2073 6.2396 90 90 90 *Pmmn .25 .25 0 atom x y z Rb1 .25 .25 .487 Rb2 .25 .75 .533 Al1 0 0 0 F1 .25 -.0356 -.021 F2 .0396 .25 .0350 F3 -.0098 -.0232 .2786