Synthesis and Structures of A Series of Novel Rare Earth Transition Metal Sulfates

• Published in: Journal of rare earths Vol. 24; no. 6; pp. 659 - 662
• Main Author: 王希渠 刘鲁美 Allan J. Jacobson
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2006; Department of Chemistry and Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5003, USA
• Subjects: crystal structure; hydrothermal synthesis; rare earth sulfate; transition metal sulfate; 晶体结构; 水热合成; 稀土硫酸盐; 过渡金属硫酸盐; rare earth sulfate; transition metal sulfate; crystal structure; hydrothermal synthesis
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(07)60004-0

Seven new rare earth transition metal sulfates were synthesized by hydrothermal reactions under conditions slightly above the critical point of water. Their crystal structures were determined from single crystal X-ray data. The compositions of the new compounds can be represented by two general formulae ： REM （OH） 3 （SO4） and RE2M （OH） 3 （SO4） 2F （H2O） with RE = Gd, Tb, Dy ; M = Ni, Cu. Three different crystal structure types were found for the formula REM （OH） 3 （SO4）. The structures of the new compounds all feature infinite chains of REOn coordination polyhedra, which are connected to chains of CuO6 or NiO6 octabedra. The limited size range of the rare earth cations observed in these compounds is most likely because of interactions between the octabedral chains and the chains of REOn polyhedra. The new compounds are closely related to the known yttrium transition metal sulfates.