Anhydrous ammonioguanidinium(2+) and dihydrated bis[aminoguanidinium(1+)] hexafluoro­silicates: new co-products of preparing ferroelectric ammonioguanidinium(2+) hexafluoro­zirconate

Ross, C.R. II; Bauer, M.R.; Nielson, R.M.; Abrahams, S.C.

doi:10.1107/S0108768198013044

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 3
(a) The content of the (CH₇N₄)₂SiF₆·2H₂O unit cell at room temperature with octahedral SiF $[_6^{2-}]$ ions depicted as shaded solid polyhedra, the CH₇N [_4^+]

cations by connected filled circles for C and N, the H₂O molecules by closed circles for O, open circles for H atoms. (b) The hydrogen-bond distribution in the (CH₇N₄)₂SiF₆·2H₂O unit cell as viewed along the b axis from y = 0 to ½, with all atoms labeled. (c) The arrangement of the (CH₇N₄)₂SiF₆·2H₂O unit-cell contents on (021), as viewed along the a axis. H4A and H4B are enlarged slightly for clarity.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 55| Part 2| April 1999| Pages 246-254

doi:10.1107/S0108768198013044

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