| Content Provider |
World Health Organization (WHO)-Global Index Medicus |
| Author |
Conti, Claudia Realini, Marco Brambilla, Luigi Colombo, Chiara Casati, Marco Possenti, Elena Zerbi, Giuseppe Gatta, G. Diego Merlini, Marco |
| Description |
Author Affiliation: Conti C ( Istituto per la Conservazione e la Valorizzazione dei Beni Culturali, CNR, Via Cozzi 53, 20125 Milano, Italy. Electronic address: c.conti@icvbc.cnr.it.); Casati M ( Istituto per la Conservazione e la Valorizzazione dei Beni Culturali, CNR, Via Cozzi 53, 20125 Milano, Italy); Colombo C ( Istituto per la Conservazione e la Valorizzazione dei Beni Culturali, CNR, Via Cozzi 53, 20125 Milano, Italy.); Possenti E ( Istituto per la Conservazione e la Valorizzazione dei Beni Culturali, CNR, Via Cozzi 53, 20125 Milano, Italy.); Realini M ( Istituto per la Conservazione e la Valorizzazione dei Beni Culturali, CNR, Via Cozzi 53, 20125 Milano, Italy.); Gatta GD ( Dipartimento di Scienze della Terra, Università degli Studi di Milano, Via Botticelli 23, I-20133 Milano, Italy); Merlini M ( Dipartimento di Scienze della Terra, Università degli Studi di Milano, Via Botticelli 23, I-20133 Milano, Italy.); Brambilla L ( Dipartimento Chimica, Materiali e Ingegneria Chimica 'Giulio Natta', Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy.); Zerbi G ( Dipartimento Chimica, Materiali e Ingegneria Chimica 'Giulio Natta', Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy.) |
| Abstract |
Calcium oxalate is found in nature in three different crystalline states determined by the number of H2O in the unit formula (whewellite CaC2O4·H2O, COM; weddellite CaC2O4·(2+x)H2O, COD and caoxite CaC2O4·3H2O, COT). The properties of these materials are relevant in the field of biomedicine, cultural heritage and mineralogy. In two previous papers, we have used X-ray diffraction and vibrational spectroscopy (infrared and Raman) to derive information on crystal and molecular structures of COM and COD. In this paper, we complete the synthesis and analysis on the third form, COT, and present a comparative study of the data collected from the three crystalline states. The experiments clearly highlight the role played by the H2O molecules linked within the structure by different kinds of hydrogen bonds. The vibrational assignment of the infrared and Raman bands are critically proposed. The fact relevant for the work in biomedicine, cultural heritage and crystallography is that a simple examination of the spectra allows quickly to determine the chemical nature of the material in an unknown sample even in a minute quantity or in awkward experimental conditions. |
| ISSN |
13861425 |
| Volume Number |
150 |
| e-ISSN |
18733557 |
| Journal |
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy |
| Language |
English |
| Publisher |
Elsevier |
| Publisher Date |
2015-01-01 |
| Publisher Place |
Great Britain (UK) |
| Access Restriction |
One Nation One Subscription (ONOS) |
| Subject Keyword |
Calcium Oxalate Chemistry Chemical Synthesis Crystallization Models, Molecular Spectrophotometry, Infrared Spectrum Analysis, Raman Synchrotrons X-ray Diffraction Journal Article Discipline Spectroscopy |
| Content Type |
Text |
| Resource Type |
Article |
| Subject |
Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation |
