Heliolit

См. также в других словарях:

• Didymium — (Greek: twin element) is a mixture of the elements praseodymium and neodymium. It is used in safety glasses for glassblowing and blacksmithing, especially when a gas (propane) powered forge is used, where it provides a filter which selectively… …   Wikipedia

• Praseodymium — (pronEng|ˌpreɪzioʊˈdɪmiəm or IPA|/ˌpreɪsioʊˈdɪmiəm/) is a chemical element that has the symbol Pr and atomic number 59. Characteristics Praseodymium is a soft silvery metal in the lanthanide group. It is somewhat more resistant to corrosion in… …   Wikipedia

• Praseodimio — Saltar a navegación, búsqueda Cerio Praseodimio Neodimio Pr Pa       Tabla completa …   Wikipedia Español