The crystal structure of ferroelastic deuterated betaine arsenate, (CH3)3NCH2COO·D3AsO4

H. Ratajczak Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okolna 2, Wroclaw, Poland; Department of Theoretical Chemistry and Chemical Physics, Institute of Chemistry, University of Wroclaw, Wroclaw, Poland

A. Muller Department of Inorganic Chemistry, University of Bielefeld, Bielefeld, Germany

H. Bogge Department of Inorganic Chemistry, University of Bielefeld, Bielefeld, Germany

J. Baran Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okolna 2, Wroclaw, Poland

M. M. Ilczyszyn Department of Theoretical Chemistry and Chemical Physics, Institute of Chemistry, University of Wroclaw, Wroclaw, Poland

The crystal structure of a ferroelastic deuterated betaine arsenate has been determined by the X-ray diffraction method as monoclinic, space group P21/n, with a = 9.561(6), b = 12.923(9), c = 8.141(5) Å, β = 91.06(5)° and Z = 4. The crystal structure is very similar to the undeuterated betaine arsenate (W. Schildkamp, G. Schafer and J. Spilker, Z. Kristallogr., 168, 187 (1984)). Due to the deuteration of the OH group in the betaine arsenate relatively large changes in the structural parameters, in particular bond lengths, are observed.

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The crystal structure of ferroelastic deuterated betaine arsenate, (CH3)3NCH2COO·D3AsO4

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