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zhangtianwen銀蟲 (小有名氣)
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[求助]
Zn3(VO4)2的熔點(diǎn)
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| Zn3(VO4)2的熔點(diǎn)是多少? |
木蟲 (正式寫手)
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這是查到的一篇文章,Zn3(VO4)2 在795℃發(fā)生一次相變?chǔ)痢,?15℃發(fā)生第二次相變?chǔ)隆茫ㄊ聦?shí)上是分解為 b-Zn2V2O7 and Zn4V2O9)。也就是說討論Zn3(VO4)2 的熔點(diǎn)沒有意義。 There are wide divergences of the authors opinion about polymorphism of zinc orthovanadate(V). Brown and Hummel [1], Pollard [2] and Hng and Knowles [8] point out that Zn3(VO4)2 occurs in three polymorphic forms, and the reversible process, a-Zn3(VO4)2戀-Zn3(VO4)2, takes place at 795°C. The other reversible polymorphic process, b-Zn3(VO4)2最-Zn3(VO4)2, runs at 815°C. Clark and Pick [4] maintain that Zn3(VO4)2 exists in two polymorphic forms a and b. A high-temperature b-Zn3(VO4)2 form breaks down at 815°C to yield b-Zn2V2O7 and Zn4V2O9 [4]. |

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