Iceland+spar
61Huocheng County — The Huocheng (Qorghas) County ( zh. 霍城县) is situated within the Xinjiang Uyghur Autonomous Region and under the administration of the Ili Kazakh Autonomous Prefecture. It s located between Yining and the border to Kazakhstan, occupies an area of… …
62Исландский шпат — (по месту обнаружения первого крупного м ния в Исландии * a. Iceland spar; н. Islandspat, islandischer Spat, Doppelspat; ф. spath d Islande; и. espato de Islandia) прозрачная крупнокристаллич. разновидность Кальцита, ценное оптич. сырьё.… …
63Исландский шпат — Кристалл исландского шпата Исландский шпат (англ. iceland spar) прозрачная крупнокристаллическая разновидность кальцита (CaCO3). Получил название п …
64oxyacid — /ok see as id/, n. Chem. an inorganic acid containing oxygen. Also called oxygen acid. [1830 40; OXY 2 + ACID] * * * ▪ chemical compound Introduction any oxygen containing acid. Most covalent nonmetallic oxides (oxide) react with water to… …
65positive crystal — noun a doubly refracting crystal in which the index of refraction for the extraordinary ray is greater than for the ordinary ray, and the former is refracted nearer to the axis than the latter, such as as quartz and ice; as opposed to negative… …
66calcite — A naturally occurring mineral found in several forms, e.g., chalk, Iceland spar, limestone, marble. SEE ALSO: calcium carbonate. SYN: calcspar. * * * cal·cite kal .sīt n a mineral CaCO3 consisting of calcium carbonate crystallized in hexagonal… …
67Malus , Etienne Louis — (1775–1812) French military engineer and physicist Malus, who was born in Paris, attended the military school in Mezières (1793) and the newly established Ecole Polytechnique (1794–96) where he received his basic scientific education. He was… …
68Nicol , William — (1768–1852) British geologist and physicist Little is known about Nicol s early life except that he was born in Scotland. Primarily a geologist, he lectured in natural philosophy at the University of Edinburgh where James Clerk Maxwell was… …
69Nicol prism — two slabs of Iceland spar cemented together and deflecting a ray of light in such a way that it is split in two, one part (the ordinary ray) being totally reflected and the other (polarized ray) passing through …
70polarized light — (nicol) An optical material (Iceland spar) that function as a prism,separating light rays that pass through it into two portions, one of which is reflected away, and the other transmitted. The transmitted portion is called plane polarized… …
