Hafnium tetrafluoride

Hafnium tetrafluoride [13709-52-9] is one component in the cladding layer of a proposed zirconium fluoride glass optical waveguide fiber composition which is expected to have a lower intrinsic light absorption than fused quart2 optical fiber (see Glass Fiber optics Fluorine compounds, inorganic-zirconium). 

Hafnium Halides. Hafnium tetrafluoride, HfF, can be prepared by careful thermal decomposition of ammonium fluorohafnate in an... 

Hafnium metal, analysis of, 13 87 Hafnium nitride, 13 89—90, 93 Hafnium oxide, 13 89, 93—94 reduction of, 73 84 Hafnium sulfides, 73 94 Hafnium tetrabromide, 73 93 Hafnium tetrachloride, 73 92 26 631 vapor reduction of, 73 84-85 Hafnium tetrafluoride, 73 90, 91 Hafnium tetrahydridoborate, 73 90 Hagen-Poiseuille expression/law, 27 726, 729 Hagen-Poiseuille flow, in microfluidics, 26 961... 

Hafnium fluoride Hf + 4F —> HfF, also known as hafnium tetrafluoride. 

Reaction with hydrofluoric acid at ordinary temperatures yields hafnium tetrafluoride, HfF4. 

Hafnium tetrafluoride may be prepared by passing anhydrous hydrogen fluoride over hafnium tetrachloride at 300°C ... 

The volumes per formula unit for the tetrafluorides are not easily correlated, unlike those for the di- and trifluorides. This reflects the change from three-dimensional, network solids to either two-dimensional, or more loosely linked, networks. Significantly, the smallest volume is found for zirconium and hafnium tetrafluorides, although these metal atoms have the largest sizes. However, with an eight-... 

Infrared spectra of 1 1 adducts of xenon difluoride with molybdenum and tungsten hexafluorides and 2 1 adducts with tin, zirconium and hafnium tetrafluorides have been assigned on the basis of their containing [XeF]+ cations [XeF]+[MF6]2-(M = Ti, Zr, Hf) 84-85>. This is supported in the case of 2 XeF2 SnF4 by Mossbauer work 86). Data on nXeF2 TiF4 (n = 1.5, 1 and 0.5) are less well defined 87). 

Bis(7T-ethylcyclopentadienyl)hafnium difluoride has been synthesized by the reaction of hafnium tetrafluoride and ethylcyclopentadiene in the presence of an organic base (221). 

HfF4 HAFNIUM TETRAFLUORIDE 815 InCI INDIUM MONOCHLORIDE 850... 

HfF4[g] HAFNIUM TETRAFLUORIDE (GAS) 816 lnCI[g] INDIUM MONOCHLORIDE (GAS) 851... 

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