Planar B<sub>4</sub> Rhomboids: The Rare Earth Boride Halides RE<sub>4</sub>X<sub>5</sub>B<sub>4</sub>


The new compounds RE4X5B4(RE)La, Ce, Pr, Gd and X)Br, I) and RE4I5B2C RE)La, Ce) are prepared via the reaction of RE metal, REX3and B, or B and C at temperatures 1670gTg 1270 K in welded tantalum ampoules. Chains of interconnected B4 rhomboids are the characteristic features of the crystal structures. According to band structure calculations, the compounds are one-dimensional metals which undergo a gradual metal-to-semiconductor transition at low temperature as experimentally indicated by the steep inrease of electrical resistivity

Similar works

Full text



Last time updated on 15/06/2019

This paper was published in MPG.PuRe.

Having an issue?

Is data on this page outdated, violates copyrights or anything else? Report the problem now and we will take corresponding actions after reviewing your request.