Chemical-Garden Formation, Morphology, and Composition. I. Effect of the Nature of the Cations

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• 作者：Julyan H. E. Cartwright ; Bruno Escribano ; C. Ignacio Sainz-Di虂az
• 刊名：Langmuir
• 出版年：2011
• 出版时间：April 5, 2011
• 年：2011
• 卷：27
• 期：7
• 页码：3286-3293
• 全文大小：1003K
• 年卷期：v.27,no.7(April 5, 2011)
• ISSN：1520-5827

文摘

We have grown chemical gardens in different sodium silicate solutions from several metal-ion salts鈥攃alcium chloride, manganese chloride, cobalt chloride, and nickel sulfate鈥攚ith cations from period 4 of the periodic table. We have studied their formation process using photography, examined the morphologies produced using scanning electron microscopy (SEM), and analyzed chemical compositions using X-ray powder diffraction (XRD) and energy dispersive X-ray analysis (EDX) to understand better the physical and chemical processes involved in the chemical-garden reaction. We have identified different growth regimes in these salts that are dependent on the concentration of silicate solution and the nature of the cations involved.