Synthesis, Structural Characterization, and Magnetic Properties of Nare9(geo4)(6)o-2 (re=nd, Pr)

Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/9751

Title:	Synthesis, Structural Characterization, and Magnetic Properties of Nare9(geo4)(6)o-2 (re=nd, Pr)
Authors:	Eanes, Mehtap Pennington, WT Kolis, JW
Keywords:	hydrothermal crystal structure germanate oxyapatite rare earths
Publisher:	Elsevier Ltd.
Abstract:	The new compounds NaRE9(GeO4)(6)O-2 (RE = Nd, Pr) have been synthesized at 500 and 524 degreesC, respectively, via the hydrothermal method. The compounds crystallize with an oxyapatite structure in the hexagonal space group P6(3)/m with one formula unit in a cell of dimensions a = 9.782(1) Angstrom, c = 7.083(1) Angstrom (T = 293 K), V = 587.0(2) Angstrom(3) for RE = Nd and a = 9.802(1) Angstrom, c = 7.116(1) Angstrom (T = 293 K), V = 592.1(2) Angstrom(3) for RE = Pr. Each structure is composed of REO7 and REO9 polyhedra as well as GeO4 tetrahedra. The magnetic susceptibility data indicates paramagnetic behavior for both compounds at temperatures between 60-300 K for Nd and 2-300 K for Pr with a Weiss constant of theta = 44.8 and 33.5 K for Nd and Pr, respectively. (C) 2003 Elsevier B.V. All rights reserved.
URI:	https://doi.org/10.1016/S0925-8388(03)00725-4 https://hdl.handle.net/11147/9751
ISSN:	0925-8388
Appears in Collections:	WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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