F4 Gd2 K4 O9 Mercier N, Leblanc M, Durand J European Journal of Solid State and Inorganic Chemistry 34 (1997) 241-249 New frequency doubling compounds: K4Ln2(CO3)3F4 (Ln = Pr,Nd,Sm,Gd,Eu); crystal structure and characterization _cod_database_code 1000474 _database_code_amcsd 0012607 9.0268 9.0268 13.684 90 90 120 R32 atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Gd1 0 0 .3561 .0091 .0091 .0090 .0046 0 0 K1 0 0 0 .0155 .0155 .0209 .0076 0 0 K2 .3719 0 .5 .0329 .0290 .0194 .0145 -.0031 -.0062 C1 .6457 0 0 .0100 .0086 .042 .0043 -.0010 -.0020 O1 .1428 .7850 .0017 .0106 .0115 .0824 .0035 .0051 .0016 O2 .5023 0 0 .0124 .0173 .0506 .0087 -.0020 -.0039 F1 0 0 .1945 .0298 .0298 .0127 .0149 0 0 F2 .0505 .8997 .5002 .333 .0136 .092 .0143 .018 .011 -.002