An organically templated cadmium selenate of the formula [enH2][Cd(H2O)2(SeO4)2],
I
, has been synthesized by carrying out the reaction between CdO and H2SeO4 in the presence of the amine in aqueous medium at 80°C. The structure of
I
involves isolated infinite [Cd(H2O)2(SeO4)2]2− chains running along the c-axis, with the protonated ethylenediamine molecules between them. Crystal data for
I
are as follows: Monoclinic, space group=C2/c, a=10.5059(7), b=10.3605(7), c=10.6028(7)
A
̊
, β=94.666(2)°, V=1150.25(13)
A
̊
3
, z=8, R
1=0.0237, wR
2=0.0500 (for all data).
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