Helen Megaw
Irish X-ray crystallographer
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Physics Chemistry
Helen Megaw's Degrees
- PhD Physics Trinity College Dublin
Why Is Helen Megaw Influential?
(Suggest an Edit or Addition)According to Wikipedia, Helen Dick Megaw was an Irish crystallographer who was a pioneer in X-ray crystallography. She made measurements of the cell dimensions of ice and established the Perovskite crystal structure. Education and career Megaw was born in Dublin to mathematics teacher Annie McElderry and judge Robert Megaw, two graduates of Queen's University Belfast who were both originally from Ballymoney, Antrim. She was educated at first at Alexandra College in Dublin, and then briefly at Methodist College in Belfast after the family moved back there in 1921, and finally at the Roedean School in England. While still at school, Megaw read Bragg's X-rays and Crystal Structure. She spent a year Queen's University, Belfast before moving to Girton College, Cambridge to study Natural Sciences in 1926. She graduated in 1930 and was a research student in crystallography under J. D. Bernal. Megaw's first speciality was the structure of ice, and she was awarded her PhD in 1934, and Girton awarded her a Hertha Ayrton research scholarship which she used to study in Vienna in 1934-1935 under Hermann Francis Mark. In 1935 Megaw co-published with Bernal an influential method for fixing the position of hydrogen atoms known as the Bernal-Megaw model. She spent the year 1935–1936 in Oxford with Francis Simon and then spent several years as a schoolteacher before becoming an industrial crystallographer with Philips Lamps in London in 1943. It was through work at Philips on barium titanate that Megaw first worked on the perovskite crystal structure, on which she established herself as an acknowledged expert. In 1945 Megaw returned to working with Bernal, now at Birkbeck College in London, for a year before taking a post at the Cavendish Laboratory in Cambridge. She became a Fellow and Director of Studies at Girton. Megaw retired in 1972 and divided her time between Cambridge and Ballycastle, County Antrim, where she died in 2002.
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