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Journal of the Meteorological Society of Japan
The correlation among the gohei twins, seagull and spearhead-type crystals, which are typical polycrystalline snow crystals of low temperature types, was discussed based on a number of microphotographs taken in the polar regions and obtained in laboratory experiments. The crystal structure of the spearhead type was determined, that is, the angle between the c-axes is 116* and the supplementary angle of intersection of two prism planes is 31*. The spearhead-type crystal is the twin whosedoi:10.2151/jmsj1965.67.4_521 fatcat:payvugcgvvdmvl7vpv26dkfrby