Crossword clues for dilithium
Wiktionary
n. 1 A fictional crystalline mineral in the ''Star Trek'' franchise, described as an essential component of anti-matter energy generation systems. 2 (context inorganic compound English) The diatomic molecule Li2 found in the gas phase. 3 (context chemistry especially in combination English) Two lithium atoms in a molecule.
Wikipedia
Dilithium, Li, is a strongly electrophilic, diatomic molecule comprising two lithium atoms covalently bonded together. Li is known in the gas phase. It has a bond order of 1, an internuclear separation of 267.3 pm and a bond energy of 101 kJ mol or 1.03eV in each bond. The electron configuration of Li may be written as σ.
It has been observed that 1% (by mass) of lithium in the vapor phase is in the form of dilithium. Molecules containing more than two lithium atoms covalently bonded together do exist, albeit in smaller quantities than dilithium. Clusters of lithium atoms also exist; the most common arrangement is Li.
Being the lightest stable neutral homonuclear diatomic molecule after H, and the helium dimer, dilithium is an extremely important model system for studying fundamentals of physics, chemistry, and electronic structure theory. It is the most thoroughly characterized compound in terms of the accuracy and completeness of the empirical potential energy curves of its electronic states. Analytic empirical potential energy curves have been constructed for the X-state, a-state, A-state, c-state, B-state, 2d-state, and l-state, E-state, and the F-state mainly by professors Robert J. Le Roy of University of Waterloo and Nikesh S. Dattani of University of Oxford. The most reliable of these potential energy curves are of the Morse/Long-range variety.
Li potentials are often used to extract atomic properties. For example, the C value for atomic lithium extracted from the A-state potential of Li by Le Roy et al. in is more precise than any previously measured atomic oscillator strength. This lithium oscillator strength is related to the radiative lifetime of atomic lithium and is used as a benchmark for atomic clocks and measurements of fundamental constants.
Electronic State
Spectroscopic Symbol
Molecular term symbol
Bond length in pm
Dissociation energy in cm
# of bound vibrational levels
Scattering length in Angstroms
References
Ground
X
1Σ
267.298 74(19)
8 516.780 0(23)
39
2
a
1Σ
417.000 6(32)
333.779 5(62)
11
3
b
1Π
4
A
1Σ
310.792 88(36)
9 353.179 5 (28)
118
5
c
1Σ
306.543 6(16)
7093.4926(86)
104
6
B
1Π
293.617 142(310)
298 4.444
118
7
E
3(?)Σ
In the Star Trek fictional universe, dilithium is an invented material which serves as a controlling agent in the faster-than-light warp drive. In the original series, dilithium crystals were rare and could not be replicated, making the search for them a recurring plot element. According to a periodic table shown during a Next Generation episode, it has the chemical symbol Dt and the atomic number 87, which in reality belongs to francium.
In the real world, dilithium (Li) is a molecule composed of two covalently bonded lithium atoms.
Usage examples of "dilithium".
Uhura crossed to the food service unit in the corner, where the quiet, dark-haired ensign was guarding a steaming kettle of soup and half a loaf of rehydrated bread as conscientiously as if they were made of dilithium.
But I've just discovered an element in the alloy's waste will allow me to compensate for the problem with the theta-matric compositing system, increasing the speed of the dilithium recrystalliza-tion.
Although he knew that Commander Grace’s modifications to the deflector shields protected the ship’s dilithium crystals from the region’s debilitative effects, it was still comforting to be back in normal space.
Even at the lower speeds, with such extended use, you start running into problems like dilithium crystal embrittlement, plasma-bottle deterioration, and that kind of thing.
Darkened engine rooms would thunder with the pulse of great dilithium hearts, and the blood and muscle organs in the chests of her eager crew would leap up in answer, until what finally ignited her sleeping warp core was that combined symphony of animal and mineral, creature and machine.
Of course, I had to do it in my quarters and not in the dilithium lab so as not to upset my good friend Montgomery, who studied multiphysics with an ass and cannot be held responsible for his beliefs.
And he was having an affair with a multisexual chief engineer, who was in turn (according to the latest rumors, and since the entire vessel seemed to be powered not by dilithium crystals but by innuendo, it was probably accurate) serving to sate the mating lust of the normally staid chief medical officer.
Akladi was not a planet of great natural gifts, except for the isotope of protactinium necessary for the cracking of dilithium.
Formerly exploited by the Romulans as slave laborers in the dilithium mines of their all-but-uninhabitable homeworld of Remus, the Remans have used the current political turmoil to add to the pool of ships and weaponry they apparently began assembling quietly during the manifold distractions of the Dominion War.