Scheiner's Halo: Evidence for Ice Ic in the Atmosphere
- 23 January 1981
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 211 (4480) , 389-390
- https://doi.org/10.1126/science.211.4480.389
Abstract
Refraction of sunlight at the angle of minimum deviation between octahedral faces of crystals of ice Ic in the upper atmosphere could produce a halo around the sun or the moon at 27.46 degrees . Crystals of hexagonal ice having low-index faces cannot produce a halo of this radius. It is therefore suggested that Scheiner's halo, which has been reported at least four times since 1629 at 28 degrees from the sun, is due to ice Ic. If this is correct, it is apparently the first evidence that ice Ic occurs naturally and that liquid water can freeze to ice Ic.Keywords
This publication has 9 references indexed in Scilit:
- Arcs associated with halos of unusual radiiJournal of the Optical Society of America, 1979
- THE CONCENTRIC HALO DISPLAY OF 14 APRIL 1974Weather, 1976
- Supercooling of Water to -92°C Under PressureScience, 1975
- The Chemical Physics of IcePublished by Cambridge University Press (CUP) ,1970
- Gitterparameter von Eis I bei tiefen TemperaturenActa Crystallographica, 1967
- TRANSFORMATIONS OF ICE VI AND ICE VII AT ATMOSPHERIC PRESSURECanadian Journal of Chemistry, 1964
- Transformations of Ice II, Ice III, and Ice V at Atmospheric PressureThe Journal of Chemical Physics, 1963
- Thermal expansion of iceActa Crystallographica, 1960
- SOLAR HALO OF MAY 11, 1915, AT SAND KEY, FLA.Monthly Weather Review, 1915