Vitreous

Figure Bl.26.17. (a) Observed and calculated ellipsometric [A(1), T(>l)] spectra for the Y2O3 film on vitreous silica. Angle of incidence 75°. (b) Best-fit model of the Y2O3 film on vitreous silica (Chindaudom P and Vedam K 1994 Physics of Thin Films vol 19, ed K Vedam (New York Academic) p 191).

Selenium exists in several allotropic forms. Three are generally recognized, but as many as that have been claimed. Selenium can be prepared with either an amorphous or crystalline structure. The color of amorphous selenium is either red, in powder form, or black, in vitreous form. Crystalline monoclinic selenium is a deep red crystalline hexagonal selenium, the most stable variety, is a metallic gray. [Pg.96]

THERMOELECTRICENERGYCONVERSION] (Vol23) -oxygen-generating system for [OXYGEN-GENERATION SYSTEMS] (Vol 17) -vitreous silica windows [SILICA - VITREOUS SILICA] (Vol 21)... [Pg.67]

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