Structural Characterization of Doped Calcium Tartrate Tetrahydrate

✍ Scribed by Manuel E Torres; Trinidad López; Josefina Stockel; Xavier Solans; Maite Garcı́a-Vallés; Enrique Rodrı́guez-Castellón; Cristina González-Silgo

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 393 KB
• Volume: 163
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2001.9435

✦ Synopsis

Crystals of calcium tartrate tetrahydrate were grown in silica gel medium in pure form and with barium, strontium, cobalt, nickel, manganese, zinc, and cadmium as dopants. The crystals, with formula D x Ca 1+x (C 4 H 4 O 6 ).4H 2 O (where D ‫؍‬ doping atom), were characterized by X-ray di4raction, photoelectron spectroscopy, and Raman spectroscopy. Some of the doping atoms are located in the host lattice and others are distributed at random positions, especially on the surface of the crystals. In the host lattice the doping atom replaces Ca when an earth alkaline atoms is used but occupies an interstitial site when a transition metal atom is used. The dielectric permittivity is higher in doped compounds.

2002 Elsevier Science (USA)