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A new mixed ammonium tin oxalate trihydrate, Sn 2 (NH 4 ) 2 (C 2 O 4 ) 3 .3H 2 O, has been prepared from evaporation of a solution of tin and ammonium oxalates. Its crystal structure has been solved from single-crystal diffraction data. The symmetry is orthorhombic, space group Pnma (No. 62), cell dimensions a=15.1821(5)<space>Å, b=11.7506(2)<space>Å,...
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