- didymium glass
- 釹鐠玻璃
English-Chinese dictionary. 2013.
didymium glass
Look at other dictionaries:
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
Glass coloring and color marking — may be obtained by 1) addition of coloring ions,[1][2] by 2) precipitation of nanometer sized colloides (so called striking glasses[1] such as ruby gold [3] or red selenium ruby ),[2] 3) by colored … Wikipedia
didymium — noun Etymology: New Latin, from Greek didymos twin, from dyo two more at two Date: 1842 a mixture of rare earth elements made up chiefly of neodymium and praseodymium and used especially for coloring glass for optical filters … New Collegiate Dictionary
didymium — [dɪ dɪmɪəm] noun Chemistry a mixture containing the rare earth elements praseodymium and neodymium, used to colour glass for optical filters. Origin C19: from Gk didumos twin + ium … English new terms dictionary
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
Neodymium — praseodymium ← neodymium → promethium ↑ Nd ↓ U … Wikipedia
Rare earth element — Rare earth ore, shown with a United States penny for size comparison These rare … Wikipedia
praseodymium — /pray zee oh dim ee euhm, pray see /, n. Chem. a rare earth, metallic, trivalent element, named from its green salts. Symbol: Pr; at. wt.: 140.91; at. no.: 59; sp. gr.: 6.77 at 20°C. [1880 85; < NL, equiv. to praseo (comb. form repr. Gk prásios… … Universalium
rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 … Universalium
Lanthanum — (pronEng|ˈlænθənəm) is a chemical element with the symbol La and atomic number 57. Characteristics Lanthanum is a silvery white metallic element that belongs to group 3 of the periodic table and is a lanthanoid. Found in some rare earth minerals … Wikipedia
neodymium — /nee oh dim ee euhm/, n. Chem. a rare earth, metallic, trivalent element occurring with cerium and other rare earth metals, and having rose colored to violet colored salts. Symbol: Nd; at. wt.: 144.24; at. no.: 60; sp. gr.: 6.9 at 20°C. [1880 85; … Universalium
