Synthetic minerals

Minerals Synthetic mineral fibers Synthetic organic fibers... 

For example, in bulk appHcations as thermal insulation, synthetic mineral fibers (glass or slag fibers) have adequately replaced natural asbestos fibers. In sprayed insulation coatings, asbestos fibers have been replaced, for example, by vermicuhte. As replacement for asbestos textiles, clothing made from aramid fibers or aluminized glass fibers is being offered (see High PERFORMANCE FIBERS). 

Table 8. Exposure Limits for Asbestos Fibers, Synthetic Mineral Fibers (SMF) and Nuisance Dust in the Workplace ...

Synthetics, Mineral Oils, and Bio-Based Lubricants Chemistry and Technology, edited by Leslie R. Rudnick Alcoholic Fuels, edited by Shelley Minteer Bubbles, Drops, and Particles in Non-Newtonian Fluids, Second Edition, R. P. Chhabra... 

Synthetics, Mineral Oils, and Bio-Based Lubricants Chemistry andTechnology, edited by Leslie R. Rudnick... 

Some of the differences in solubilities are also related to different disordering of the crystal surface. As shown by Bishop et al. (1987) with Raman investigations, the biogenic phases are characterized by greater positional disorder than synthetic minerals of the same composition. 

Synthetic mineral fibers from fiberglass insulation, mineral wood insulation, etc. and... 

Watson, I. (1979) Iron oxide pigments. Colour-frd competitors between natural and synthetic. Minerals in Industry, Aug., 43—51 Watson, J.H.L., Cardell, R.R.Jr. Heller, W. (1962) The internal structure of colloidal crystals of P-FeOOH and remarks on their assemblies in Schiller layers. J. Phys. Chem. 66 1757-1763... 

D.E. Sandstrom, Solid State Nuclear Magnetic Resonance of Synthetic Mineral Surfaces, Thesis, Lulea University of Technology, Lulea, Sweden, 2006. 

The steady-state luminescence of Pr + in minerals was found only in scheel-ite, where the hne near 480 nm has been ascribed to this center (Gorobets and Kudrina 1976) and possibly in fluorite (Krasilschikova et al. 1986). The luminescence of Pr in minerals is difficult to detect because its radiative transitions are hidden by the stronger lines of Sm in the orange range of 600-650 nm, Dy " " in the blue range of 470-490 nm and Nd in the near IR (870-900 nm). In order to extract the hidden Pr lines time-resolved luminescence was applied. The fact was used that Pr " usually has a relatively short decay time compared to its competitors Dy ", Sm " and Nd, especially from the Po level. In order to correct identification of Pr " lines in minerals several of them were synthesized and artificially activated by Pr (Fig. 5.5). Besides, comparison has been made with CL spectra of synthetic minerals artificially activated by Pr (Blank et al. 2000). 

The main feature is the green emission corresponding to transitions from state S j2 to the ground state At the same time, an intense luminescence may be detected at 1.5 pm, which is caused by resonance transitions 13/215/2- The presence of green luminescence indicates that the de-activation of the high level accompanied by IR emission is not complete, but it results in a relatively short decay time of Er " green emission. Thus the luminescence of Er is easier to detect in time-resolved spectra with a narrow gate. In order for correct identification of Er " " lines in minerals several of them were synthesized and artificially activated by Er (Fig. 5.19). Besides that, comparison has been made with CL spectra of synthetic minerals artificially activated by Er (Blank et al. 2000). 

In order to enable correct identification of Ho " lines in minerals several of them were synthesized and artificially acfivafed by Ho (Eig. 5.20). Besides that, comparison has been made with CL spectra of synthetic minerals artificially acfivated by Ho (Blank ef al. 2000). Luminescence of Ho was detected in time-... 

The Interpretation of Luminescence Centers chapter is devoted to a detailed explanation of the luminescence centers interpretation process, which comprises investigation of spectral and kinetic parameters of excitation and emission at different temperatures from 4.2 to 300 K. In numerous cases the interpretation is confirmed by the study of synthetic minerals analogs artificially activated by potential impurities, which may serve as emission centers. The following luminescence centers have been confidently detected and interpreted ... 

T0789 Texilla Environmental, Inc., Synthetic Mineral Immobilization Technology (SMITE)... 

T0789 Texilla Environmental, Inc., Synthetic Mineral Immobilization Technology (SMITE) T0791 The Chlorine Institute, Inc., Thermal Desorption (Mercury Contamination)... 

It is clear from the figures that these chlorites are usually richer in silica, than berthierines or magnesian 7 X synthetic minerals. The compositions are quite variable (1 5 ionic percent Si or Al), but nevertheless the compositions determined from grain to grain in one sample do not exceed the limits defined for synthetic 14 X chlorites (Velde, 1973). 

Synthetic mineral fibers (fiberglass) Fiber manufacturing and installation Bronchus... 

---