On the morphology of SrCO3 crystals grown at the interface between two immiscible liquids

Bulletin of materials science

S R Sainkar¹  Satyanarayana Reddy¹  Murali Sastry¹  Debabrata Rautaray¹ 

[1] Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India$$Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, IndiaMaterials Chemistry Division, National Chemical Laboratory, Pune 411 008, India$$

关键词: Crystal morphology;    interfaces;    minerals;    solvents;    polycrystalline deposition.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

In this paper we report on the growth of strontianite crystals at the interface between an aqueous solution of Sr²⁺ ions and organic solutions of chloroform and hexane containing fatty acid/fatty amine molecules by reaction with sodium carbonate. When fatty acid was used as an additive at the interface, the crystals grown were self-assembled needle shaped strontianite crystallites branching out from the seed crystal via secondary nucleation. Under identical conditions of supersaturation, the presence of fatty amine molecules at the liquidâ€�?�liquid interface resulted in needle shaped strontianite crystals with spherical crystallites arranged around central needles. This clearly indicates that the functionality of the head group of the amphiphiles at the liquidâ€�?�liquid interface affects the morphology of the strontium carbonate crystals formed. The use of interfacial effects such as dielectric discontinuity, polarity and finite solubility of the two solvents etc opens up exciting possibilities for tailoring the morphology of crystals at the liquidâ€�?�liquid interface and is currently not possible in the more popular crystal growth with similar amphiphiles at the airâ€�?�water interface.

【 授权许可】

Unknown