The crystal structure of sodium bicarbonate

Abstract

The atomic parameters in sodium bicarbonate are redetermined. The resulting bicarbonate ion structure differs significantly from that found in other salts. The bicarbonate ion was found to have C~v symmetry (excluding the hydrogen atom), with C-O bond distances equal to 1.346, 1.264 and 1.263 A. The hydrogen bond distance between adjacent bicarbonate ions is 2.595 A. These dimensions are compared with those in related compounds.

Crystal structure of sibirskite (CaHBO3) by Monte Carlo simulation and Rietveld refinement

“…The R values based on the intensity and structure factors are R I = 4.22% and R F = 4.68% for sibirskite, and R I = 7.51% and R F = 4.22% for calcite. The results of the Rietveld refinement are shown in Table 1 and Figure 1, and the crystal structure projected onto the (001) plane is shown in Figure 2, along with the crystal structure of nahcolite (NaHCO 3 ; Sass and Scheuerman, 1962). The atomic coordinates and selected bond distances are listed in Tables 2 and 3, respectively.…”

Application of environmental tracers to study groundwater recharge in a semi-arid area of Central Tunisia

“…The naturally occurring deposits of this carbonate mineral are found to be of Eoceneage (55.8-33.9 Ma) rocks (Sass and Scheuerman 1962). However, as SO 4 2-increases, a Ca 2+ deficit appears (Fig.…”

The phase transition of rubidium hydrogen carbonate, RbHCO3

“…pairs in KHCO 3 ; Thomas et al, 1974), infinite chains (e.g. NaHCO 3 ; Sass & Scheuerman, 1962) or two-dimensional networks (e.g. CsH 2 PO 4 ; Uesu & Kobayashi, 1976).…”