Near-infrared spectroscopic study of selected hydrated hydroxylated phosphates
Ray L Frost1, Kristy L Erickson
1Inorganic Materials Research Program, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Qld 4001, Australia. r.frost@qut.edu.au
Abstract:
Near-infrared spectroscopy has been applied to a suite of hydrated hydroxylated phosphate minerals including cacoxenite, hureaulite, planerite, gormanite and wardite. The NIR spectra may be conveniently divided into three regions (a) the first hydroxyl fundamental, (b) the water HOH overtone and (c) the region between 4000 and 4800 cm(-1) where combination bands resulting from the bands in the mid-IR. For each of these regions, the minerals show distinctive spectra which enable their identification and characterisation. NIR spectroscopy is a less used technique which does have great application for the study of minerals, particularly minerals which have hydrogen in the structure either as hydroxyl units or as water bonded to the cation or as zeolitic water as is the case for cacoxenite. The study of minerals on planets is topical and NIR spectroscopy provides a rapid technique for the distinction and identification of minerals.
Related Concept Videos
Photoluminescence: Applications
Protein Kinases and Phosphatases
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Phosphorylation
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
IR Spectrum Peak Broadening: Hydrogen Bonding
However, the extent of hydrogen bonding influences the observed stretching frequency and band broadening. Intermolecular or intramolecular hydrogen bonding...
Phosphodiester Linkages
Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
Phosphodiester Bonds Link Nucleotides Together
DNA and RNA are polynucleotides or long chains of nucleotides that are linked together. A nucleotide is...
IR and UV–Vis Spectroscopy of Aldehydes and Ketones


