1. Hydrothermal Synthetic Red Beryl from the Institute of Crystallography, Moscow
- Author
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Ludmila N. Demianets, John I. Koivula, Shane Elen, Shane F. McClure, Taijin Lu, Jo Ellen Cole, and James E. Shigley
- Subjects
Crystallography ,Materials science ,Transition metal ,Geochemistry and Petrology ,Infrared spectroscopy ,Crystal structure ,Alkali metal ,Hydrothermal circulation - Abstract
42 SYNTHETIC RED BERYL GEMS & GEMOLOGY SPRING 2001 both natural and synthetic, plus Ti, Co, and Ni in synthetic beryls; Sinkankas, 1981; Fritsch and Rossman, 1987). These elements substitute for Al. Alkali elements (Li, Na, K, Rb, Cs) can also occur in minor amounts by substituting for Be and Al (Sinkankas, 1981; Aurisicchio et al., 1988; Deer et al., 1997, pp. 378–386); however, these elements do not affect beryl coloration. The beryl crystal structure contains two different sites along “open” channels that can incorporate water molecules (Schaller et al., 1962; Wood and Nassau, 1968; Schmetzer, 1989; Deer et al., 1997). These variations in transition metal, alkali element, and water contents in beryls cause differences in physical properties (such as refractive index, specific gravity, and color), as well as in visible and infrared absorption spectra.
- Published
- 2001
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