University Chemistry ›› 2020, Vol. 35 ›› Issue (1): 118-124.doi: 10.3866/PKU.DXHX201904013

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Macroscopic Morphology of Alum(K) Crystal

Tianyi Zhang,Yufan Pan,Yihan Xu,Aili Cui*()   

  • Received:2019-04-09 Accepted:2019-05-31 Published:2019-06-12
  • Contact: Aili Cui


In this paper, a simple thermodynamic model of crystal macroscopic morphology and the cause of the defects were suggested. By virtue of growing alum(K) crystals and measuring their macroscopic parameters in the inorganic laboratory for undergraduates, we can calculate the thermodynamic parameters of alum, thus explaining the macroscopic morphology and defect of alum(K), and predicting the possibility for alum(K) to generate octahedral crystals and its self-normality.

Key words: Alum(K), Macroscopic crystallographic planes, Self-normality