Electrum is a metal alloy mainly consisting of gold, silver and traces of some other metals. This naturally occurring alloy has a long history of being used for making coins, vessels and also for coatings. It was referred to as âgoldâ or âwhite goldâ by ancient Greeks.
In Interstitial defect, atom occupies the interstitial space of the lattice structure of solid crystal. In Substitutional defect, the foreign atom occupies only the lattice site of a crystalline solid. Interstitial defect may occur by the atoms of either same solid (called self-interstitial) or foreign material. Substitutional defect is always caused by foreign atoms.
c. Lesser Tubercle (Tuberculum minus) is a roughened area located medial to the greater tubercle. It serves as the insertion site for the subscapularis muscle. d. Intertubercular Groove or Sulcus (Sulcus inter-tubercularis) is a narrow, longitudinal depression between the greater and lesser tubercles. This indentation, which is also called the bicipital groove, is a passageway for the tendon of the long head of the biceps brachii.