搜搜考试网为什么氧化锌加热变成黄色?
来源：学生作业帮 编辑：搜搜考试网作业帮 分类：英语作业 时间：2024/06/06 16:22:34
为什么氧化锌加热变成黄色?
一种说法阳离子极化能力增大,共价键极化性增大,颜色加深
还有一种说法,原文如下
ZnO occurs as white powder known as zinc white or as the mineral zincite.The mineral usually contains a certain amount of manganese and other elements and is of yellow to red color.[2] Crystalline zinc oxide is thermochromic,changing from white to yellow when heated and in air reverting to white on cooling.[3] This is caused by a very small loss of oxygen at high temperatures to form the non-stoichiometric Zn1+xO,where at 800 °C,x= 0.00007.[3]
还有一种说法,原文如下
ZnO occurs as white powder known as zinc white or as the mineral zincite.The mineral usually contains a certain amount of manganese and other elements and is of yellow to red color.[2] Crystalline zinc oxide is thermochromic,changing from white to yellow when heated and in air reverting to white on cooling.[3] This is caused by a very small loss of oxygen at high temperatures to form the non-stoichiometric Zn1+xO,where at 800 °C,x= 0.00007.[3]