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A solid solution series of atacamite type Ni2xMg2-2xCl(OH)3

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Dinnebier,  R. E.
Scientific Facility X-Ray Diffraction (Robert E. Dinnebier), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Bette, S., Dinnebier, R. E., Roder, C., & Freyer, D. (2015). A solid solution series of atacamite type Ni2xMg2-2xCl(OH)3. Journal of Solid State Chemistry, 228, 131-140.


Cite as: https://hdl.handle.net/21.11116/0000-000E-CC68-8
Abstract
For the first time a complete solid solution series Ni2xMg2-2xCl(OH)(3) of an atacamite type alkaline main group metal chloride, Mg2Cl(OH)(3), and a transition group metal chloride, Ni2Cl(OH)(3), was prepared and characterized by chemical and thermal analysis as well as by Raman and IR spectroscopy, and high resolution laboratory X-ray powder diffraction. All members of the solid solution series crystallize in space group Pnam (62). The main building units of these crystal structures are distorted, edge-linked Ni/MgO4Cl2 and Ni/MgO5Cl octahedra. The distribution of Ni2+- and Mg2+-ions among these two metal-sites within the solid solution series is discussed in detail. The crystallization of the solid solution phases occurs via an intermediate solid solution series, (Ni/Mg)Cl-2x(OH)(2-2x), with variable Cl: OH ratio up to the 1:3 ratio according to the formula Ni2xMg2-2x Cl(OH)(3). For one isolated intermediate solid solution member, Ni0.70Mg0.30Cl0.58(OH)(1.42), the formation and crystal structure is presented as well. (C) 2015 Elsevier Inc. All rights reserved.