Polyhalite and its analogous triple salts |
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| Authors: | Georgia Wollmann Daniela Freyer and Wolfgang Voigt |
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| Institution: | (1) Department of Pharmaceutics, University of Minnesota, Minneapolis, Minnesota 55455, USA;(2) Pharmaceutics R&D, Bristol Myers Squibb Company, New Brunswick, New Jersey 08903, USA;(3) Department of Physics, Keele University, Staffordshire, ST5-5BG, UK; |
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| Abstract: | Polyhalite (K2SO4 · MgSO4 · 2CaSO4 · 2H2O) and analogue triple salts, where Mg2+ is substituted by Mn2+, Fe2+, Co2+, Ni2+, Cu2+ and Zn2+, have been synthesized. The salts were characterized by thermal analysis, Raman spectroscopy and X-ray powder diffraction.
Diffraction patterns and Raman spectra resemble those of natural polyhalite, except K2SO4 · CuSO4 · 2CaSO4 · 2H2O. The latter corresponds to the mineral leightonite, which is structurally different. |
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