title: Evidence of structural variability among synthetic and biogenic vaterite.
abstract: Recently, the results of experimental and theoretical investigations have revealed that, in vaterite, two or even more crystalline structures coexist. In this communication we report evidence of diverse vaterite structures in biogenic samples of different origin. In addition, it is shown that the synthetic vaterite precipitated in the presence of poly-l-aspartate has structures similar to those of biogenic samples.
authors.affiliation: Dipartimento di Chimica "G. Ciamician", Alma Mater Studiorum-Universita' di Bologna, via Selmi 2, 40126 Bologna, Italy. giuseppe.falini@unibo.it.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Falini
authors.forename: Simona
authors.initials: S
authors.lastname: Fermani
authors.forename: Michela
authors.initials: M
authors.lastname: Reggi
authors.forename: Branka
authors.initials: B
authors.lastname: Njegić Džakula
authors.forename: Damir
authors.initials: D
authors.lastname: Kralj
mesh_terms: D000818:Animals; D002119:Calcium Carbonate / Q000138:chemical synthesis / Q000737:chemistry*; D002122:Calcium Chloride / Q000737:chemistry; D002152:Calorimetry, Differential Scanning; D002254:Carbonates / Q000737:chemistry; D011232:Chemical Precipitation; D003460:Crystallization; D003530:Cyprinidae; D008855:Microscopy, Electron, Scanning; D015394:Molecular Structure; D010455:Peptides / Q000737:chemistry; D017693:Sodium Bicarbonate / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D049876:Unionidae; D014561:Urochordata; D014961:X-Ray Diffraction
chemical_list: D002254:Carbonates; D010455:Peptides; C017645:polyaspartate; C005686:sodium carbonate; D017693:Sodium Bicarbonate; D002119:Calcium Carbonate; D002122:Calcium Chloride