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.
Interstitial lung disease (ILD) (also known as Diffuse Parenchymal Lung Disease) is a broad â term /. blanket â term that describes a group of as many as 200 chronic progressive lung disorders that. share similar characteristics of alveolar septal thickening, fibroblast proliferation, collagen. deposition and, most often, pulmonary scarring (fibrosis). This set of disorders can further be. classified as acute or chronic, primary or secondary, secondary to a known cause or of unknown. causes (idiopathic), granulomatous or non-granulomatous, etcâ¦ Interstitial Lung Disease is also.