title: Tetra-ethyl-ammonium bicarbonate trihydrate.
abstract: In the title compound, C(8)H(20)N(+)·CHO(3) (-)·3H(2)O, the bicarbon-ate anion, which has a small mean deviation from the plane of 0.0014 Å, fully utilises its three O and one H atom to form various O-H⋯O hydrogen bonds with the three water mol-ecules in the asymmetric unit, generating a hydrogen-bonded layer, which extends along (10[Formula: see text]). The tetra-ethyl-ammonium cations, as the guest species, are accommodated between every two neighboring layers, constructing a sandwich-like structure with an inter-layer distance of 7.28 Å.
authors.forename: Heping
authors.initials: H
authors.lastname: Li
authors.forename: Yimin
authors.initials: Y
authors.lastname: Hou
authors.forename: Yunxia
authors.initials: Y
authors.lastname: Yang
references.citation: Angew Chem Int Ed Engl. 2002 Oct 18;41(20):3848-51
references.pmid: 12386867
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677