title: Raman and infrared spectroscopic study of the anhydrous carbonate minerals shortite and barytocalcite.
abstract: The Raman spectra of shortite and barytocalcite complimented with infrared spectra have been used to characterise the structure of these carbonate minerals. The Raman spectrum of barytocalcite shows a single band at 1086 cm(-1) attributed to the (CO3)(2-) symmetric stretching mode, in contrast to shortite where two bands are observed. The observation of two bands for shortite confirms the concept of more than one crystallographically distinct carbonate unit in the unit cell. Multiple bands are observed for the antisymmetric stretching and bending region for these minerals proving that the carbonate unit is distorted in the structure of both shortite and barytocalcite.
authors.affiliation: Inorganic Materials Research Program, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane Queensland 4001, Australia. r.frost@qut.edu.au
authors.forename: Ray L
authors.initials: RL
authors.lastname: Frost
authors.forename: Marilla J
authors.initials: MJ
authors.lastname: Dickfos
mesh_terms: D002244:Carbon / Q000737:chemistry; D002254:Carbonates / Q000737:chemistry*; D003460:Crystallization; D007477:Ions; D008274:Magnesium / Q000737:chemistry; D008903:Minerals / Q000737:chemistry*; D010710:Phosphates / Q000737:chemistry; D011188:Potassium / Q000737:chemistry; D013055:Spectrophotometry, Infrared / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013059:Spectrum Analysis, Raman / Q000379:methods*; D014961:X-Ray Diffraction
chemical_list: D002254:Carbonates; D007477:Ions; D008903:Minerals; D010710:Phosphates; C533170:barytocalcite; C533169:shortite; D002244:Carbon; D008274:Magnesium; D011188:Potassium