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Within this range, only 96 Nb, 101 Nb, and 103 Nb do not have isomers. The most stable of niobium's isomers is 93m Nb with half-life 16.13 years. The least stable isomer is 84m Nb with a half-life of 103 ns. All of niobium's isomers decay by isomeric transition or beta decay except 92m1 Nb, which has a minor electron capture branch. [44]
Hennepin County. Father Louis Hennepin was the first European explorer to visit and name Saint Anthony Falls, the tallest waterfall on the Mississippi River, in 1680.While the falls were familiar to the Ojibwe and Sioux Indians who lived in the area, Father Hennepin spread word of the falls when he returned to France in 1683.
Map all coordinates using OpenStreetMap Download coordinates as: KML GPX (all coordinates) GPX (primary coordinates) GPX (secondary coordinates) This is a list of sites in Minnesota which are included in the National Register of Historic Places. There are more than 1,700 properties and historic districts listed on the NRHP; each of Minnesota's 87 counties has at least 2 listings. Twenty-two ...
This list includes notable permanent geographic sections in Minneapolis, such as unofficial neighborhood, commercial districts, residential areas, and other defined places. The list excludes streets, venues, transit stops, trails, government facilities, lakes, parks, and events.
Niobium–tin is an intermetallic compound of niobium (Nb) and tin (Sn), used industrially as a type-II superconductor. This intermetallic compound has a simple structure: A3B . It is more expensive than niobium–titanium (NbTi), but remains superconducting up to a magnetic flux density of 30 teslas [T] (300,000 G), [ 1 ] compared to a limit ...
The Panic of 1893 caused Menage's company to collapse, and he fled the country. Thomas Lowry, another major real estate speculator and the owner of the area's streetcar network, purchased the building but only held onto it for a little more than a decade before selling it to the Metropolitan Life Insurance Company in 1905.
Naturally occurring niobium (41 Nb) is composed of one stable isotope (93 Nb). The most stable radioisotope is 92 Nb with a half-life of 34.7 million years. The next longest-lived niobium isotopes are 94 Nb (half-life: 20,300 years) and 91 Nb with a half-life of 680 years. There is also a meta state of 93 Nb at 31 keV whose half-life is 16.13 ...
Ferroniobium is an important iron-niobium alloy, with a niobium content of 60-70%. [1] It is the main source for niobium alloying of HSLA steel and covers more than 80% of the worldwide niobium production. The niobium is mined from pyrochlore deposits and is subsequently transformed into the niobium pentoxide Nb 2 O 5.
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