X-ray and neutron diffraction studies of the hydration of SeO4= and CrO4= anions by isomorphic substition.

Caminiti, Ruggero; Cilloco, F.; Felici, R.

doi:10.1080/00268979200101611

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The structure in aqueous solutions of the hydrated selenate and chromated ions SeO42- and CrO42- have been derived from X-ray and neutron diffraction measurements using CrO42- as an isomorphous substitute for SeO42-. The Se(Cr)-O bond lengths are 1.63 +/- 0.02 angstrom and do not differ from those found in crystal structure. A well defined hydration shell of about 12 water molecules surrounds the XO42- ions at a Se(Cr)-H2O distance of 3.96 angstrom. The diffraction results indicate a geometrical orientation of the water molecule around the tetrahedral anions very similar to that one found in the case of simple anions such as Cl-, with Se(Cr)-D distances of 3.25 and 4.4 angstrom and with a Se(Cr)-O distance of 3.96 angstrom

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Titolo:	X-ray and neutron diffraction studies of the hydration of SeO4= and CrO4= anions by isomorphic substition.
Autori:	CAMINITI, Ruggero F. CILLOCO R. FELICI mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	1992
Rivista:	MOLECULAR PHYSICS
Abstract:	The structure in aqueous solutions of the hydrated selenate and chromated ions SeO42- and CrO42- have been derived from X-ray and neutron diffraction measurements using CrO42- as an isomorphous substitute for SeO42-. The Se(Cr)-O bond lengths are 1.63 +/- 0.02 angstrom and do not differ from those found in crystal structure. A well defined hydration shell of about 12 water molecules surrounds the XO42- ions at a Se(Cr)-H2O distance of 3.96 angstrom. The diffraction results indicate a geometrical orientation of the water molecule around the tetrahedral anions very similar to that one found in the case of simple anions such as Cl-, with Se(Cr)-D distances of 3.25 and 4.4 angstrom and with a Se(Cr)-O distance of 3.96 angstrom
Handle:	http://hdl.handle.net/11573/29478
Appare nella tipologia:	01a Articolo in rivista

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