Jh. Chen et Pk. Dorhout, SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF A NEW RARE-EARTH SELENODIPHOSPHATE(IV) - KLAP2SE6, Inorganic chemistry, 34(23), 1995, pp. 5705
The high-temperature, molten alkali-metal polyselenide salt reaction o
f the elements yielded a new, porous-layered rare-earth selenodiphosph
ate(IV), KLaP2Se6, that comprises uniquely bound [P2Se6](4-) units tha
t bind lanthanum atoms through face-capping interactions. This is the
first known rare-earth selenodiphosphate(IV) compound.