The chemical preparation, crystal structure, and infrared absorption spectrum are given for a new cyclotetraphosphate, KGdP4O12. X-ray investigations showed that the newly synthesized compound crystallizes in a monoclinic structure, space group C2/c with the following unit-cell dimensions:  a = 7.875(1), b = 12.431(2), c = 10.537(2) Å, β = 110.94(1)°, V = 963.4(3) Å3, Z = 4, and ρ = 3.532 g cm-3. The structure was solved from 1390 independent reflections with R1 = 2.99 and WR2 = 7.37%, refined with 84 parameters. As in all atomic arrangements, we observe the formation of an infinite network of P4O12 4- cyclotetraphosphate anions connected with GdO8 polyhedra to form a three-dimensional framework which delimits interesting tunnels where the K+ cations are located. In this structure, the P4O12 ring develops around an inversion center. The reported IR study, recorded at room temperature in the frequency range 400−4000 cm-1, shows some characteristics bands of cyclotetraphosphates.

The novel sulfate-bridged binuclear copper (II) complex namely [Cu2(µ3-SO4)2(C4H6N2)4] (1) was obtained from the hydrothermal reaction of 2-methylimidazole (hereafter abbreviated as 2- MeIm) with copper (II) sulfate pentahydrate in methanol....

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Potassium gadolinium polyphosphate, KGd(PO(3))(4), was synthesized using the flux method. The atomic arrangement consists of an infinite long-chain polyphosphate organization. Two types of chains, with a period of eight PO(4) tetrahedra, run along the [101] direction. The Gd atoms have an eightfold coordination, while the K atoms have nine O-atom neighbours.