Synthesis and Investigation of Indium Dodecatungstosilicate

摘要

Indium dodecatungstosilicate of the composition [In(OH)centre dot 5H_2O]_2[SiW_12O_40] centre dot H_2O is synthesized and studied by means of IR spectroscopy,thermogravimetry,and X-ray phase analysis.The crystals of this compound are triclinic,space group PI,a 13.079(3),b 13.795(3),c 13.967(3)A,alpha 90.08(3)deg,beta 103.76(3)deg,gammal07.76(3)deg,Z 2,and pi_calc 4.900 g cm~(-3).Heteropoly compounds are representatives of coordination compounds rather complex and interesting from the theoretical viewpoint.They have found wide and versatile practical use in various fields of science and engineering.Nowadays an important role in the chemistry of heteropoly compounds belongs to the synthesis of new compounds and investigation of their properties,aimed at extending the range of their practical use.Due to the unique combination of redox and acid-base properties,heteropoly compounds are widely used in