明矾的宏观晶体形状

doi:10.3866/PKU.DXHX201904013

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*()

Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China

Received:2019-04-09 Accepted:2019-05-31 Published:2019-06-12
Contact: Aili Cui E-mail:cuial@mail.tsinghua.edu.cn

Abstract

Abstract:

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

MSC2000:

G64

Tianyi Zhang,Yufan Pan,Yihan Xu,Aili Cui. Macroscopic Morphology of Alum(K) Crystal[J].University Chemistry, 2020, 35(1): 118-124.

温度/℃	溶解度/(g/100 g水)
0	3
10	4
20	5.9
40	11.7
50	17
60	25
70	40
80	71
90	109
100	154

编号	a/cm	b/cm
1	0.90(5)	0.10(5)
2	1.30(5)	0.30(5)
3	1.50(5)	0.40(5)
4	1.60(5)	0.45(5)
5	1.70(5)	0.50(5)

编号	a/cm	b/cm	k₀/cm²	k₁/cm	k₂/cm
1	0.90	0.10	2.76	13.12	1.24
2	1.30	0.30	5.46	15.61	3.73
3	1.50	0.40	7.09	16.85	4.97
4	1.60	0.45	7.98	17.47	5.59
5	1.70	0.50	8.91	18.09	6.21

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4	崔爱莉. 基础无机化学实验, 北京: 清华大学出版社, 2018, 71- 74.

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Macroscopic Morphology of Alum(K) Crystal

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