Encore - Sector-like Plate Snow Crystal

September 10, 2016


Today and every Saturday Earth Science Picture of the Day invites you to rediscover favorites from the past. Saturday posts feature an EPOD that was chosen by viewers like you in our monthly Viewers' Choice polls. Join us as we look back at these intriguing and captivating images.


Provided by: The Schwerdtfeger Library
Summary Author: Jim Foster

December 2011 Earth Science Picture of the Day Viewer's Choice Shown above is a fine example of a plate snow crystal photographed nearly 100 years ago by Wilson Bentley (1865-1931) at his outdoor laboratory in Jericho, Vermont. This beauty is referred to as a hexagonal (six-sided), sector-like plate crystal with extensions. It’s but one of several thousand micrographs taken by Bentley and prepared on glass lantern slides -- he pioneered the method of photographing snow crystals. Snow crystals take shape and grow from the water vapor in cold clouds. The water molecules that compose an ice crystal are destined to form a hexagonal lattice structure. So the familiar six-sided shape of snow crystals (six-fold symmetry) is a direct result of the six-fold symmetry of the ice crystal lattice. To see more of Bentley’s impressive crystal collection visit the Schwerdtfeger Library (Bentley Collection).