摘要
在现有文献中收录的Na2 CrO4 熔点数据各不相同 ,有 792℃、392℃ ,两者相差 4 0 0℃左右。利用热分析法观测Na2 CrO4 熔点 ,确定其熔点应为 792℃。并且在 4 19.6℃存在着一个可逆的固 固相变 ,转变焓为 148.6J·g-
There are two different values of melting point of anhydrous sodium chromate recorded in the present literatures, i.e. 792℃ and 392℃, having a difference of 400℃. As a verification, a differential thermal analysis is done, and a melting point of 792℃ is found. It is also found that there is a reversible solid solid phase transition at 419.6℃ with a transition enthalpy of 148.6J·g -1 .
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2001年第5期198-199,201,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
差热分析
无水铬酸钠
熔点
测定
纯度
Differential thermal analysis
Anhydrous sodium chromate
Melting point
