Abstract: | Preparation and Crystal Structure of KLa2(NH2)7 KLa2(NH2)7 was prepared by the reaction of the pure metals K and La in the atomic ratio 1:2 with ammonia as reagent and solvent. At 350°C and 5000 atm NH3- pressure single crystals of the compound can be obtained. KLa2(NH2)7 is orthorhombic with the following spacings a = 6.89, b = 10.33 and c = 15.85 Å. The lattice contains four formula units. The space group is Pnnm (No. 58). The positions of K, La and N were obtained by x-ray single crystal examination. The structure of KLa2(NH2)7 may not be explained starting with one of the possible close-packings of the anions. |