Kathrin Hofmann

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BACKGROUND Metal borides are a class of inorganic solids that is much less known and investigated than for example metal oxides or intermetallics. At the same time it is a highly versatile and interesting class of compounds in terms of physical and chemical properties, like semiconductivity, ferromagnetism, or catalytic activity. This makes these substances(More)
We trapped an unknown metastable boride by applying low-temperature solution synthesis. Single-phase nickel boride, Ni7B3, was obtained as bulk samples of microcrystalline powders when annealing the amorphous, nanoscale precipitate that is formed in aqueous solution of nickel chloride upon reaction with sodium tetrahydridoborate. Its crystal structure was(More)
Seit dem 11. August 2007 steht nicht mehr nur das Ausspähen, sondern zusätzlich auch das Abfangen von Daten unter Strafe, desgleichen Vorbereitungshandlungen hierzu in Form des Zugänglichmachens von Passwörtern oder zu deren Ausforschung geeigneten Computerprogrammen. Entgegen der erklärten Absicht des Gesetzgebers unterfallen dem neuen Straftatbestand aber(More)
The crystal structure of bis(triethylammonium)c/o5o-decahydrodecaborate [bis(triethylammonium)decaboranate(lO)], [(CaHs^NHMBioHio], was determined and refined (space group Pmmn, no. 59, a = 989.7, b = 1333.7, c = 903.7 pm). The compound is a versatile starting material for many substances containing the [BioHio]2entity and its derivatives. The(More)
Three types of boron-rich compounds in unusual bonding situations are described: First, salts that contain closo-hydroborate anions and exhibit hydrogen and dihydrogen bonds and a strong ammonia network; second, boron-rich metal borides with an unexpected metal-metal bond stabilized by Peierls distortion; and third, nanoscale metal borides that bind(More)
Noch immer geh6ren f~icheriibergreifende Forschungen bei uns zu den eher seltenen Ans~itzen, obwohl bessere Kennmisse der 6kosys temaren Zusammenh~inge in Wiildern ganz wesentl ich yon solchen interdisziplin~iren Unte r suchungen abh~ingen. Nach dem Soiling ist 1979 in einem zweiten gros Waldgebiet , dem Sch6nbuch bei T/.ibingen, auf 7200 ha ein vom Tr~iger(More)