Abstract
The crystalline nature of water drops 45-465μm in diameter, frozen and deformed in free fall, was observed. The deformation of the frozen drop is closely related to its crystalline nature. For example, shattering is inferred to occur mostly when a water drop freezes single-crystalline, and a shattered fragment is mostly an almost hemispherical single-crystal-line particle with c-axis perpendicular to its fractured face. A spike, a relatively long protrusion, is formed mostly when a water drop freezes poly-crystalline and protrudes from the crystal boundary.
