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

Caminiti, R.; 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

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/29478

Titolo:	X-ray and neutron diffraction studies of the hydration of SeO4= and CrO4= anions by isomorphic substition.
Autori interni:	CAMINITI, Ruggero
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 nelle tipologie:	01.a Pubblicazione su Rivista

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