These minerals resemble silicates in some respect, although boron is often found not only in a tetrahedral coordination with oxygen, but also in a trigonal planar configuration.
2.
It was shown, as expected, that the instability and distortions of the planar configuration ( as in any other systems in nondegenerate state ) is due to the PJTE.
3.
In 2002, rather than using SRR-wire configuration, or other 3-D media, researchers looked at planar configurations that supported backward wave propagation, thus demonstrating negative refractive index and focusing as a consequence.
4.
With increasingly abstract and large-scale works Personal Panel Uniforms ( 1995-1998 ), Carpet Furniture, Parallel Planar Panels, Planar Pavilions, Planar Configurations, and Linear Sequences Zittel questions preconceptions regarding the functional, psychological, and even spiritual meanings of horizontality and verticality.
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