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
Marriage and wedding customs in the Philippines the coin bearer acts as the holder and keeper of the arrhae until it is offered and given by the groom to his bride. Among the secondary sponsors or wedding attendants, three pairs – each pair consists of a male and a female secondary sponsor – are chosen to light the wedding candles, handle the veils, and place the cord. After the exchange of wedding rings by the couple, the groom gives the wedding arrhae to his bride. The arrhae is a symbol of his "monetary gift" to the bride because it is composed of 13 pieces of gold, or