Synthesis and X-ray Powder Structure of a New Pillared Layered Cadmium Phosphonate, Giving Evidence that the Intercalation of Alkylamines into Cd(O(3)PR).H(2)O Is Topotactic.

A new pillared layered phosphonate, cadmium 2-aminoethylphosphonate, Cd(O(3)PC(2)H(4)NH(2)) (1), has been synthesized, and its structure was solved ab initio from X-ray powder diffraction data and refined by Rietveld methods. Compound 1 is orthorhombic: space group Pna2(1), a = 15.4643(2) Å, b = 5.

Syntheses and Crystal Structures of a Linear-Chain Uranyl Phenylphosphinate UO(2)(O(2)PHC(6)H(5))(2) and Layered Uranyl Methylphosphonate UO(2)(O(3)PCH(3)).

Two extended uranyl organophosphorus compounds have been synthesized and structurally characterized. Linear-chain uranyl bis(phenylphosphinate), UO(2)(O(2)PHC(6)H(5))(2), was synthesized at 60 degrees C, and its structure was solved by single-crystal methods. UO(2)(O(2)PHC(6)H(5))(2) crystallizes in the triclinic space group P&onemacr; with unit cell parameters a = 5.

The First Determination of Eu-H Distances by Neutron Diffraction on the Novel Hydrides EuMgH and EuMgH.

Despite the high neutron absorption of natural europium, the crystal structures of two Eu hydrides could be solved from powder diffraction data. EuMgD crystallizes in a novel ABX structure type (see picture), EuMgD is isotypic to BaZnF. The mean Eu-D distances are 258 and 253 pm, respectively.