Controlling the polymorph and morphology of CaCO3 crystals using surfactant mixtures

Modified magnetic properties of ZnLa0.02Fe1.98O4 clusters by anionic surfactant with solvothermal method

“…1B when the SDS was used. This band can be attributed to SDS molecules [8]. The result indicates that the SDS molecules were adsorbed at the surfaces of the sample [10].…”

“…It is well known that the size, structure, and shape affect the magnetic properties of the product [6,7]. Surfactants have been used to modify the size, structure and shape of the materials [8]. However, effects of a surfactant on magnetic properties of magnetic particles have not been reported as far as we know.…”

Aragonite–vaterite–calcite: Polymorphs of CaCO3 in 7th century CE lime plasters of Alampur group of temples, India

“…The vibrational bands around 1430-1475 cm À1 were assigned to the characteristic inplane bending and symmetric carbonate out of plane bending vibrations of calcite and aragonite. Simultaneous occurrence of peaks at 745 cm À1 (in m 4 mode), and 870 cm À1 (in m 2 mode), and symmetric peaks at 1020 cm À1 , 1084 cm À1 and 1490 cm À1 confirmed the presence of vaterite [42][43][44]. The characteristic bands of silicates or alumino silicates were observed at the spectral region of 1000-900 cm À1 in the plaster.…”

Effect of NTA and temperature on crystal growth and phase transformations of CaCO3

“…In most of the cases additives may favor phase transformations towards metastable forms in normal conditions i.e. low temperatures, but very few and effective additives can control the regular growth and favor the least stable phase at elevated temperatures [36][37][38]. In the presence of NTA, the crystal growth initially stabilizes aragonite, and with the increase of temperature at 100˚C vaterite is stabilized and between 130 and 200˚C growth of calcite is favored, above which vaterite alone is crystallized.…”