7783-64-4Relevant articles and documents
Synthesis of filmy ZrF4-BaF2 glasses by fluorination of amorphous oxide gels
Konishi, A.,Kanno, R.,Kawamoto, Y.
, p. 193 - 200 (1995)
Filmy gels of xZrO2-(100-x)BaO compositions (x = 100, 75, 60, 50 and 40) in mol% were prepared by a sol-gel process using zirconium n-butoxide and barium n-butoxide as starting materials. Dried gels of x=100, 75 and 60 were amorphous, while those of x=50 and 40 contained appreciable amounts of crystalline precipitates. The dried gels of x=100, 75 and 60 were fluorinated at 200 approx. 300°C using an HF or NF3 gas. Fluorination of the x=60 dried gel by NF3 at 250°C gave a filmy but monolithic 60ZrF4·40BaF2 glass. The obtained glass was characterized by X-ray diffraction, infra-red absorption, DTA and ESR. The X-ray halo pattern, IR absorption spectrum, glass-transition temperature and crystallization temperature of the glass coincided with those of a 60ZrF4·40BaF2 glass prepared by a conventional melting method.
Dugat, Pierre,El-Ghozzi, Malika,Metin, Jacques,Avignant, Daniel
, (1995)
Tofield, Bruce C.,Poulain, Marcel,Lucas, Jacques
, p. 163 - 178 (1979)
Rahten, A.,Milicev, S.
, p. 185 - 192 (1990)
Hatem, G.,Tabaries, F.,Gaune-Escard, M.
, p. 15 - 26 (1989)
Higherature monoclinic α-SrHfF6, and isostructural α-SrZrF6: Associating Hf2F12 bipolyhedra and SrF8 snub disphenoids.
Laval, Jean-Paul,Mayet, Richard
, p. 229 - 235 (2018/02/14)
The structure of the higherature monoclinic variety α-SrHfF6 (strontium hafnium hexafluoride) [and of isostructural α-SrZrF6 (strontium zirconium hexafluoride)] associates Hf2F12 bipolyhedra and SrF8 snub disphenoids, forming zigzag twisted [SrF6]n layers. The distribution of the Hf and Sr polyhedra forms a three-dimensional framework which can be related to the family of anion-excess ReO3-related superstructures. α-SrHfF6 corresponds to a new ABX6 type and is compared to the other main families already described. A partial amorphization of this structure is observed in samples quenched from the melt.The crystal structure of α-SrHfF6 corresponds to a new structure type in the ABX6 series. It associates Hf2F12 bipolyhedra and SrF8 snub disphenoids, forming zigzag twisted [SrF6]n layers.
Formation and calculations of the simple terminal triplet pnictinidene molecules n÷MF3, P÷MF3, and As÷MF3 (M = Ti, Zr, Hf)
Wang, Xuefeng,Lyon, Jonathan T.,Andrews, Lester
, p. 6297 - 6302 (2009/12/04)
Laser-ablated Ti, Zr, and Hf atoms react with NF3, PF 3, or AsF3 to produce triplet state terminal pnictinidene N÷MF3, P÷MF3, or As÷MF3 molecules, which are trapped in an argon matrix. Prod