Why Are Snowflakes Flat And Sym­met­ri­cal?

Science Illustrated - - ASK US -

Snowflakes aren't all flat, but the in­di­vid­ual snowflake is a per­fectly sym­met­ri­cal hexagon, if it is al­lowed to grow in peace and does not break. The shape is due to the hexag­o­nal struc­ture that wa­ter forms when it freezes and turns into ice.

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OHHThe hexag­o­nal shape ap­pears as a re­sult of the an­gle of the hy­dro­gen atom on the oxy­gen atom. The lo­ca­tion de­cides where the wa­ter mol­e­cules will con­nect to each other through­out the struc­ture of the en­tire crys­tal. The crys­talline form is hexag­o­nal, be­cause ice has a ba­sic struc­ture, where six wa­ter mol­e­cules are bound to­gether in a ring-like struc­ture. 3 2 The sym­me­try of the snowflake is due to the crys­talline form of frozen wa­ter, H O. 1

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