Search results
Results from the WOW.Com Content Network
Lanthanum makes up 39 mg/kg of the Earth's crust, [48] [49] behind neodymium at 41.5 mg/kg and cerium at 66.5 mg/kg. Despite being among the so-called "rare earth metals", lanthanum is thus not rare at all, but it is historically so-named because it is rarer than "common earths" such as lime and magnesia, and at the time it was recognized only ...
The Earth's crust is one "reservoir" for measurements of abundance. A reservoir is any large body to be studied as unit, like the ocean, atmosphere, mantle or crust. Different reservoirs may have different relative amounts of each element due to different chemical or mechanical processes involved in the creation of the reservoir.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Donate
Lanthanum(III) oxide, also known as lanthana, chemical formula La 2 O 3, is an inorganic compound containing the rare earth element lanthanum and oxygen. It is used in some ferroelectric materials, as a component of optical materials, and is a feedstock for certain catalysts, among other uses.
The rare-earth elements (REE), also called the rare-earth metals or rare earths, and sometimes the lanthanides or lanthanoids (although scandium and yttrium, which do not belong to this series, are usually included as rare earths), [1] are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals. Compounds containing rare ...
Spectral lines of lanthanum: Other properties; Natural occurrence: primordial: ... abundance in earth's crust: abundance in earth's crust: no description. Unknown ...
The International Space Station, launched in lower Earth orbit in 1998, has been continuously occupied since 2000, said the National Aeronautics and Space Administration. In 24 hours, the space ...
Pages in category "Lanthanum" The following 4 pages are in this category, out of 4 total. This list may not reflect recent changes. ...