| 词汇 | lanthanides |
| 释义 | BETA Examples of lanthanideslanthanides isn’t in the Cambridge Dictionary yet. You can help! The section on rare earths (lanthanides) is also notably strong. In this regard, the use of lanthanides provides a gamma of versatile paramagnetic probes, but still needs to be fully exploited. Lanthanides, in particular, can impart a large paramagnetic anisotropy and, hence, greatly enhance levels of alignment. The reason for the high potency of the lanthanides is probably partly due to their trivalency. These series are, respectively, the lanthanides and the actinides. Monazite was the only significant source of commercial lanthanides until bastnsite began to be processed in about 1965. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Because of its closed-shell electron configuration, its density and melting and boiling points differ from those of the other lanthanides. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In an aqueous solution, like compounds of other late lanthanides, soluble lutetium compounds form a complex with nine water molecules. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Other carbon rich stoichiometries are known for some lanthanides. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. About 15000 ton/year of the lanthanides are consumed as catalysts and in the production of glasses. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Compared to most other nondietary elements, non-radioactive lanthanides are classified as having low toxicity. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In the gas phase the trihalides are planar or approximately planar, the lighter lanthanides have a lower % of dimers, the heavier lanthanides a higher proportion. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is prepared by solvent extraction from the mixed lanthanides isolated from bastnsite (or monazite). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Actinium has similar chemical properties as lanthanum and other lanthanides, and therefore these elements are difficult to separate when extracting from uranium ores. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Contrary to most other lanthanides, which have a close-packed hexagonal lattice, ytterbium crystallizes in the face-centered cubic structure. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Boron nitride reacts with nitrides of alkali metals and lanthanides to form nitridoborate compounds. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Chromate and dichromate salts of heavy metals, lanthanides and alkaline earth metals are only very slightly soluble in water and are thus used as pigments. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The lanthanides elute in order of decreasing atomic number. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In aqueous solution, like compounds of other late lanthanides, soluble thulium compounds form complexes with nine water molecules. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. |
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