X-ray powder diffraction data for loratadine (C 22 H 23 ClN 2 0 2 )

X-ray powder diffraction data, unit-cell parameters, and space group for loratadine (C 22 H 23 ClN 2 O 2 ) are reported [ a  = 28.302(18) A, b  = 4.996(3) A, c  = 29.154(19) A, β  = 109.158(2)°, unit-cell volume V  = 3894.25 A 3 , Z  = 8, and space group C 2/ c ]. All measured lines were indexed and are consistent with the C 2/ c space group. No detectable impurities were observed.