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Ever the engineer, he was always tinkering and coming up with ways to improve her oxygen intake, and make her equipment more portable. That was 20 years before the advent of the portable oxygen equipment available today. Those were not easy times for them. He confessed to me that he simpl...
The band centred at 678 cm−1 can be assigned to neutral charged oxygen vacancies possibly non-bridging oxygen hole centres (NBOHCs) or similar compounds in β -cristobalite, a silica polymorph26. The small absorption peaks at 500 and 780 cm−1 are associated with In-O and Sn-O...