Abstract
The mineral nesquehonite Mg(OH)(HCO 3)·2H 2O has been analysed by a combination of infrared (IR) and infrared emission spectroscopy (IES). Both techniques show OH vibrations, both stretching and deformation modes. IES proves the OH units are stable up to 450 °C. The strong IR band at 934 cm −1 is evidence for MgOH deformation modes supporting the concept of HCO 3 − units in the molecular structure. Infrared bands at 1027, 1052 and 1098 cm −1 are attributed to the symmetric stretching modes of HCO 3 − and CO 3 2− units. Infrared bands at 1419, 1439, 1511, and 1528 cm −1 are assigned to the antisymmetric stretching modes of CO 3 2− and HCO 3 − units. IES supported by thermoanalytical results defines the thermal stability of nesquehonite. IES defines the changes in the molecular structure of nesquehonite with temperature. The results of IR and IES supports the concept that the formula of nesquehonite is better defined as Mg(OH)(HCO 3)·2H 2O.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.