Tin bent, a crackling sound known as the "tin cry" can be heard from the twinning of the crystals. Tin melts at low temperatures of about , the lowest in group 14. The melting point is further lowered to for 11 nm particles. β-tin (the metallic form, or white tin, BCT structure), which is stable at and above room temperature, is malleable. In contrast, α-tin (nonmetallic form, or gray tin), which is stable below , is brittle. α-tin has a diamond cubic crystal structure, similar to diamond, silicon or germanium. α-tin has no metallic properties at all because its atoms form
Christmas gift (exclamation) also in southern Pennsylvania, Ohio Valley, West Virginia, and later in northeastern Texas as a simple greeting and recognizing the birth of Christ as a gift. A variant of the tradition is "Christmas Eve gift". The tradition is similar to the "Christmas gift" tradition, but occurs on Christmas Eve. The person being told "Christmas Eve gift!" is expected to present the person saying it to them with a small present, traditionally candy or nuts. The Dictionary of American Regional English traces the first written uses of this version to 1954. Christmas gift (exclamation) "Christmas gift" is an exclamation traced back