Samarium pentaphosphide

Samarium pentaphosphide is a binary inorganic compound of samarium metal and phosphorus with the chemical formula SmP5.

Preparation
Samarium pentaphosphide can be prepared by heating stoichiometric amounts of samarium and phosphorus at 700 °C:
 * Sm + 5P -> SmP5

Properties
Samarium pentaphosphide forms crystals of monoclinic crystal system, spatial group P121/m1 or P21. It decomposes at 700 °C.