- double-refracting spar
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исландский шпат
English-Russian dictionary of geology. 2011.
double-refracting spar
Смотреть что такое "double-refracting spar" в других словарях:
calcareous spar — Calcite Cal cite (k[a^]l s[imac]t), n. [L. calx, calcis, lime.] (Min.) Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble.… … The Collaborative International Dictionary of English
calc-spar — Calcite Cal cite (k[a^]l s[imac]t), n. [L. calx, calcis, lime.] (Min.) Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble.… … The Collaborative International Dictionary of English
Iceland spar — Ice′land spar′ n. mir a transparent variety of calcite that is double refracting and is used as a polarizer • Etymology: 1820–30 … From formal English to slang
Iceland spar — n. a transparent, colorless calcite, found esp. in Iceland: it is used by opticians for making double refracting prisms … English World dictionary
Iceland spar — a transparent variety of calcite that is double refracting and is used as a polarizer. [1820 30] * * * also called Iceland Crystal, a transparent calcite used for polariscope prisms. See calcite. * * * … Universalium
Iceland spar — /aɪslənd ˈspa/ (say uysluhnd spah) noun a transparent variety of calcite that is double refracting and is used for polarising light …
Iceland spar — Doubly refracting Calcite from Iceberg claim, Dixon, New Mexico, United States. This 35 pound (16 kg) crystal, on display at the National Museum of Natural History, is one of the largest single crystals in the United States. Iceland spar,… … Wikipedia
Calcite — Cal cite (k[a^]l s[imac]t), n. [L. calx, calcis, lime.] (Min.) Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble. Called also … The Collaborative International Dictionary of English
Rasmus Bartholin — Infobox Scientist name = PAGENAME box width = image width =150px caption = PAGENAME birth date = August 13, 1625 birth place = Roskilde death date = November 4, 1698 death place = Kopenhagen residence = citizenship = nationality = Danish… … Wikipedia
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Natural scientific research in Canada — This article outlines the history of natural scientific research in Canada, including mathematics, physics, astronomy, space science, geology, oceanography, chemistry, biology, medical research and psychology. The social sciences are not treated… … Wikipedia
