01843nas a2200217   4500008004100000022001400041245010600055210006900161260009500230300001400325490000700339520100500346653001401351653001201365653002401377653002301401653002401424653002201448100002501470856013001495       2011                        eng d  a1533-488000aMorphology and polymorphic phase changes of calcium carbonate micro/nanocrystals using fruit extracts0 aMorphology and polymorphic phase changes of calcium carbonate mi  a25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USAbAMER SCIENTIFIC PUBLISHERScMAY  a3997-40030 v113 a<p>This study reveals the morphology and polymorphic phase changes of calcium carbonate crystals into a mixture of calcite and aragonite micro/nanocrystals of interesting morphology at room temperature by a simple reaction with fruit extracts of Tamarindus indica and Emblica officinalis respectively by mixing CaCO(3) solutions with their corresponding extracts. The control experiments were carried out to establish the plausible role of tartaric acid from Tamarindus indica and ascorbic acid from Emblica officinalis in this regard. The quantitative determination of CaCO(3) phases was done based on the use of intensities obtained from corresponding XRD spectrum. The molar %. of aragonite was found to be more in case of TA and AA rather than TI and EO respectively, however the calcite was observed to be the predominant phase in all four reactions. Interestingly, the TI changes the rhombohedral morphology of calcite to elongated rods, whereas EO induces a great polymorphic phase change.</p>10aAragonite10aCalcite10aEmblica officinalis10aMorphology Changes10aPolymorphic Changes10aTamarindus indica1 aAnkamwar, Balaprasad  uhttps://library.ncl.res.in/content/morphology-and-polymorphic-phase-changes-calcium-carbonate-micronanocrystals-using-fruit-0