Study on structure-inheriting solid-state dehydration reactions under hydrothermal conditions

The conversion mechanism of CoMoO_4·3/4H_2O into hp-CoMoO_4under hydrothermal conditions was revealed.The crystal structure of NiMoO_4·nH_2O was first determined，and was revealed to be isostructural with CoMoO_4·3/4H_2O。The structural changes of isostructural NiMoO_4·nH_2O and non-isostructural MMoO_4·H_2O(M=Mg，Mn)during the hydrothermal treatments were also investigated and were discussed comparing with those of CoMoO_4·3/4H_2O。In the course of the study，new hydrates CoMo_4O_&lt；13&gt；·2H_2O and NiMo_4O_&lt；13&gt；·2H_2O were also found，and their(Interesting Pillared Layer)structures were determined。

The conversion mechanism of CoMoO_4・3/4H_2O into hp-CoMoO_4 under hydrothermal conditions was revealed. The crystal structure of NiMoO_4・nH_2O was first determined, and was revealed to be isostructural with CoMoO_4・3/4H_2O. The structural changes of isostructural NiMoO_4・nH_2O and non-isostructural MMoO_4・H_2O (M=Mg, Mn) during the hydrothermal treatments were also investigated and were discussed comparing with those of CoMoO_4・3/4H_2O. In the course of the study, new hydrates CoMo_4O_<13>・2H_2O and NiMo_4O_<13>・2H_2O were also found, and their (interesting pillared layer) structures were determined.