Synthesis and crystal structure of sodium praseodymium polyphosphate, NaPr(PO3)4
来源期刊：JOURNAL OF RARE EARTHS2009年第1期
论文作者：K.Horchani-Naifer J.Amami M.Ferid
Key words：polyphosphate; praseodymium; crystal structure; infrared spectroscopy; rare earths;
Abstract: Reaction of Na2CO3, Pr6O11 and H3PO4 gave the sodium praseodymium polyphosphate NaPr(PO3)4. The title compound crystallized in the monoclinic P21/n space group with a=0.9965(4) nm, b=1.31437(4) nm, c=0.72271(3) nm,β=90.429(3)°, V=0.9465(4) nm3, Z=4, R=0.0493 and wR=0.1266 for 1855 independent reflections. The structure of NaPr(PO3)4 consisted of PrO8 polyhedra sharing oxygen atoms with phosphoric group PO4 to form a three-dimensional framework, delimiting intersecting tunnels in which the sodium ion was located. Each Na+ ion was bonded to seven oxygen atoms.
K.Horchani-Naifer1，J.Amami1，M.Ferid1
(1.Research Unit of Rare Earth Materials,National Research Center in Sciences of Materials,B,P,95 Hammam-Lif,2050,Tunisia)
Abstract:Reaction of Na2CO3, Pr6O11 and H3PO4 gave the sodium praseodymium polyphosphate NaPr(PO3)4. The title compound crystallized in the monoclinic P21/n space group with a=0.9965(4) nm, b=1.31437(4) nm, c=0.72271(3) nm,β=90.429(3)°, V=0.9465(4) nm3, Z=4, R=0.0493 and wR=0.1266 for 1855 independent reflections. The structure of NaPr(PO3)4 consisted of PrO8 polyhedra sharing oxygen atoms with phosphoric group PO4 to form a three-dimensional framework, delimiting intersecting tunnels in which the sodium ion was located. Each Na+ ion was bonded to seven oxygen atoms.
Key words:polyphosphate; praseodymium; crystal structure; infrared spectroscopy; rare earths;
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