Quartz has been synthesized under hydrothermal conditions at rates of 1.78 mm/day in the presence of LiNO(2) in Ag lined and Ag plated systems, and it is shown that such quartz has optical transmission between 1500 A and 3 micro equal, and in some cases superior to, natural quartz. The uv cutoff at about 1500 A has been shown to be associated with Fe whose concentration may be reduced by procedures that reduce the concentration of charge compensating H+ in the lattice (growth in LiNO(2)) and by procedures which reduce the concentration of Fe in solutions (inert conditions). Transmission near 3 micro is affected by OH which can be reduced by LiNO(2).

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The permeability (P) of niobium to hydrogen was investigated over a range of temperature between 950 to 1065°and pressure levels of 1.1 and 2.0 atmospheres. The resulting permeability was found to obey the relationship P = 2.01 X HP e-^s+iwKi' cln 3 ^O0, cm.2 mm.-1 (atm.

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This report has been distributed according to the category Metals, Ceramics, and Materials" as given in "Standard Distribu tion Lists for Unclassified Scientific and Technical Reports" TID-4500 (16th Ed.), December 15, I960. A total of 620 pages was printed.