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The cell is a solid-state battery that maintains constant pressure regardless of charging and discharging rates. The system includes an iso-temperature element. [49] In January 2024, Volkswagen announced that test results of a prototype solid-state battery retained 95% of its capacity after 1000 charges (equivalent to driving 500,000 km). It ...
Commercial rubidium clocks are less accurate than caesium atomic clocks, which serve as primary frequency standards, so a rubidium clock is usually used as a secondary frequency standard. Commercial rubidium frequency standards operate by disciplining a crystal oscillator to the rubidium hyperfine transition of 6.8 GHz (6 834 682 610.904 Hz).
Rubidium-87 has an atomic mass of 86.9091835 u, and a binding energy of 757,853 keV. Its atomic percent abundance is 27.835%, and has a half-life of 4.92 × 10 10 years . References
An example of an alkylcobalt complex in the otherwise uncommon +4 oxidation state of cobalt is the homoleptic complex tetrakis(1-norbornyl)cobalt(IV) (Co(1-norb) 4), a transition metal-alkyl complex that is notable for its resistance to β-hydrogen elimination, [29] in accord with Bredt's rule. The cobalt(III) and cobalt(V) complexes [Li(THF) 4] +
Xenotime, a REE phosphate, is the main HREE ore containing as much as 60% yttrium as yttrium phosphate (YPO 4). [56] This applies to xenotime-(Y). [ 61 ] [ 64 ] [ 60 ] The largest mine is the Bayan Obo deposit in China, making China the largest exporter for HREE since the closure of the Mountain Pass mine in the 1990s.
At 4.2 K it has a rhombohedral crystal system (with a nine-layer repeat spacing); at higher temperatures it transforms to face-centered cubic and then body-centered cubic. At liquid-helium temperatures (4 K) the rhombohedral structure is prevalent. [19] Multiple allotropic forms have been identified for lithium at high pressures. [20]