Crystallographic Data. 159. Aluminum Trifluoride, AlF₃

Abstract

free of other barium salts); no transfer of the sample from its preparation tube to the apparatus is necessary if the sample has been collected or prepared in a standard taper centrifuge tube (The preparative or collecting test tube becomes test tube A); test tube G can be removed and placed in position A for the preparation of a uniformly mixed sample or for conversion of the obtained barium carbonate to carbon dioxide for other uses; and by use of preweighed centrifuge tubes gravimetric assay of the resulting barium carbonate is possible.The results in Table I wTere obtained with this equipment. Easily oxidizable and refractory materials were utilized and results with or without catalyst and with and without recycling are reported.

ALD of YF3 Thin Films from TiF4 and Y(thd)3 Precursors

“…Also, as shown in this paper, the growth behavior may be unique to various metal fluorides. The aim of the present work was to discover if YF 3 thin films can be deposited by ALD using TiF 4 as a fluorinating agent, while using Y(thd) 3 as a cation precursor. Y(thd) 3 has already been used in ALD for depositing, e.g., Y 2 O 3 , [30][31][32][33] YScO 3 , [34] and Y 2 O 2 S [35] thin films.…”

“…The aim of the present work was to discover if YF 3 thin films can be deposited by ALD using TiF 4 as a fluorinating agent, while using Y(thd) 3 as a cation precursor. Y(thd) 3 has already been used in ALD for depositing, e.g., Y 2 O 3 , [30][31][32][33] YScO 3 , [34] and Y 2 O 2 S [35] thin films. Another aim (given that the reaction took place) was to study various film properties including the composition of the films, because the key question is how complete the reaction can be, i.e., how completely thd ligands, and especially Ti atoms, can be eliminated from the final film.…”

“…YF 3 is insoluble in water, [1] it has a wide band gap (10.3 eV), [2] and a refractive index of 1.55 at l ¼ 589 nm. [3] Due to its low absorption and low refractive index in the IR range, YF 3 is considered as a potential candidate to replace hazardous ThF 4 in various IR applications.…”

“…[3] Due to its low absorption and low refractive index in the IR range, YF 3 is considered as a potential candidate to replace hazardous ThF 4 in various IR applications. [4] Thin films of various rare earth metal fluorides are suited for optical coatings in a wide range of applications such as in IR and UV lasers, high reflectivity mirrors, and thin film interference filters, due to their excellent transmission from the UV to IR regions and low optical dispersion.…”

“…[4] Thin films of various rare earth metal fluorides are suited for optical coatings in a wide range of applications such as in IR and UV lasers, high reflectivity mirrors, and thin film interference filters, due to their excellent transmission from the UV to IR regions and low optical dispersion. [5,6] YF 3 thin films have been used as a low refractive index (about 1.30 at 10 mm) [4] material together with ZnS films for low-absorption antireflection coatings in the IR spectral range. [7] YF 3 thin films have also been applied in a one-dimensional photonic crystal structure, which consisted of 18 periods of ZnS/YF 3 layers.…”