Abstract
AbstractThe atomic structure of synthetic, deuterated goslarite (ZnSO4·7D2O),a= 11.8176(6) Å,b= 12.0755(7) Å,c= 6.8270(4)Å, space groupP212121,Z= 4, has been refined in a combined neutron powder diffraction and X-ray single-crystal data refinement towRp1.92%,Rp1.45% andR(F2)12.66% for the neutron powder data contribution andR(F2) 8.72% for the X-ray single-crystal data contribution. Both data sets were necessary to achieve the best overall fit agreement in the Rietveld refinement and reasonable geometry within structural units. The results of this study confirm that the H-bonding scheme for goslarite is the same as that of the other epsomite group minerals. Small but significant variations of the Zn–O bond lengths can be attributed to details of the H bonds to the O atoms of the Zn octahedra. This investigation of the atomic structure and hydrogen bonding of goslarite is groundwork for future studies into phase relationships and the mechanisms of hydration and dehydration in the ZnSO4–H2O system.
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