Zur Chemie und Strukturchemie der Phosphide und Polyphosphide. 15. Gadoliniumpentaphosphid GdP5

Chemistry and Structural Chemistry of Phosphides and Polyphosphides. 15. Gadoliniumpentaphosphide GdP₅ GdP₅ is formed by heating (550–800°C) of Gadolinium powder and red phosphorus with small amounts of iodine. GdP₅ crystallizes monoclinic in the space group P2₁/m with a = 4.928, b = 9.446, c = 5.370 Å, β = 102.58° and Z = 2 formula units. GdP₅ is isotypic to NdP₅. The bond lengths vary between 2.161 and 2.211 Å for the P? P bonds and 2.947 and 3.014 Å for the Gd? P bonds. The 2-dimensional network of P atoms is related to connected six membered rings (boat conformation) with specific defects. GdP, is paramagnetic with μ = 7.83 B.M.