1973
Risultati di ricerca
Notizie più importanti
18 ore fa · Terre rare, nuova scoperta in Norvegia. Un gruppo minerario norvegese ha annunciato infatti di aver trovato il «più grande giacimento» d'Europa nel sud-est del Paese. Secondo Rare Earths Norway ...
5 giorni fa · rare-earth element, any member of the group of chemical elements consisting of three elements in Group 3 (scandium [Sc], yttrium [Y], and lanthanum [La]) and the first extended row of elements below the main body of the periodic table (cerium [Ce] through lutetium [Lu]).
5 giorni fa · In planetary astronomy and astrobiology, the Rare Earth hypothesis argues that the origin of life and the evolution of biological complexity, such as sexually reproducing, multicellular organisms on Earth, and subsequently human intelligence, required an improbable combination of astrophysical and geological events and
18 ore fa · At the highest temperature of 205°C, this mineral gradually transitioned into bastnasite, a stable rare earth carbonate mineral used in industry to extract REEs for technological applications ...
1 giorno fa · They found that the elements could enter the eggshells via diffusion along the calcite boundaries and the organic matrix, and, at higher temperatures, that the rare earth built new minerals on the eggshell surface. At 90 °C, the eggshell surface helped recover formations of a rare earth compound called kozoite.
5 giorni fa · Le terre rare sono un gruppo di 17 elementi chimici. Il loro nome è piuttosto fuorviante perché non si tratta di «terre» e non sono neppure così rare. I Ree – Rare earth elements – sono lantanio, cerio, praseodimio, neodimio, promezio, samario, europio, gadolinio, terbio, disprosio, olmio, erbio, tulio, itterbio e lutezio, ittrio e ...
2 ore fa · Bastnäsite is a stable rare earth carbonate mineral that is used across the globe to extract REEs for technology applications. The unique characteristic of eggshell calcite makes it a potential ...
