著者
小林 禎作
出版者
公益社団法人 応用物理学会
雑誌
応用物理 (ISSN:03698009)
巻号頁・発行日
vol.44, no.12, pp.1234-1248, 1975-12-10 (Released:2009-02-09)
参考文献数
81

Habit and growth type of snow crystals was consolidated by Kobayashi in 1961 as far as single crystalline forms are concerned. But much has been left unknown about poly-crystalline forms of snow crystals. Kronberg-Wilson's concept of Coincidence-Site Lattice was successfully introduced to explain the structure of “twin prisms” and twelve-branched snow crystals as rotation twins which have each a twin axis parallel to the composition plane. A generalized CSL theory is now proposed to explain the structure and growth of poly-crystalline shaped crystals including a combination of bullets, a spacial assemblage of plane branches, and some of the “peculiar shaped crystals” as rotation twins which have each a twin axis perpendicular to the composition plane. Thus an important step is forwarded for the understanding of the morphology of snow crystals. Methods of microscopic observation in situ of growing ice crystals are described with the aid of illustrations and photographs.