crystal field theory

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crystal field theory

[¦krist·əl ′fēld ‚thē·ə·rē]
(physical chemistry)
The theory which assumes that the ligands of a coordination compound are the sources of negative charge which perturb the energy levels of the central metal ion and thus subject the metal ion to an electric field analogous to that within an ionic crystalline lattice.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
"The SWING FINDER[TM] formula for success is simple: squaring up your clubface equals a low spin ratio, and that's what drives your distance," says Adams, an avid golfer, mechanical engineer and popular personal trainer in North County, San Diego.
Distance and low spin were the design goals and once they had achieved that, they worked backwards to build a club that was more playable by the vast majority of golfers.
Shortly afterwards, low spin IB's were found in the ground state rotational bands of normally deformed (ND) nuclei [11-14], which showed that the occurrence of IB's is not restricted to the phenomenon of superdeformation and high-spin states.
Their values depend not only on the valence state but also on the spin states of the low spin (LS) and high spin (HS) [9].
My guess is that only significantly high spin rates, like those generated by the Bohning Stretch Fletch, will increase accuracy significantly, and a forward FOC will overcome a low spin rate.
The EPR spectra of the complexes reveal that the replacement of four O-donor atoms by two S and two N-donors converts it to a low spin complex as apparent from the g-values in range of 2.001-2.185.
Most neutron stars are spinning rapidly-a few times a second-but a small fraction have a relatively low spin rate of once every few seconds, while generating occasional large blasts of X-rays.
With the results of the analysis for the corresponding classical models being known, it is very instructive as well as natural to probe the quantum effects arising particularly in the low spin cases [9-11].
A [sup.59]Co NMR study along with the susceptibility results revealed [24] that two distinct Co ions exist at low spin states, i.e., nonmagnetic [Co.sup.3+] with spin s=0 and magnetic [Co.sup.4+] with s=1/2, as shown in Fig.
The recipe for more distance is high launch and low spin. The big struggle today is getting golfers to accept a high ball flight.
Then he went into a low spin. The aircraft was like a falling leaf." Another neighbour Gillian Hill said: "It crashed in a field and exploded in flames."