12332-08-0Relevant articles and documents
Fluorination of germanium concentrates with ammonium fluorides
D'yachenko,Kraidenko
, p. 952 - 955 (2008)
New method for processing of germanium-containing raw materials to obtain germanium oxide was suggested and studied. The method is based on the fluorination of germanium-containing raw materials with ammonium fluorides, followed by a sublimation isolation of ammonium hexafluorogermanate, its dissolution, and precipitation of germanium oxide from solution. The thermodynamics of the process was calculated and its thermogravimetric analysis was made. The kinetics of germanium oxide fluorination by ammonium hydrodifluoride was experimentally studied. A technological scheme for processing of germanium-containing raw materials with ammonium fluoride was suggested.
The preparation and structure of Ge3F8-a new mixed-valence fluoride of germanium, a convenient source of GeF2
Hector, Andrew L.,Jolleys, Andrew,Levason, William,Pugh, David,Reid, Gillian
, p. 14514 - 14516 (2014)
The new binary mixed-valence fluoride of germanium, Ge3F8, has been obtained by heating GeF4 with powdered Ge in an autoclave (390 K/4 bar/48 h). The structure contains pyramidal GeIIF3 and octahedral GeIVF6 units, linked by fluoride bridges. The new compound is the missing member of the series (GeF2)n·GeF4 (n = 2, 4, or 6). Sublimation of (GeF2)n·GeF4in vacuo provides a convenient source of GeF2 in ca. 30% overall yield. This journal is
Germanium(II) and germanium(IV) compounds from elemental germanium
Rivière,Castel,Satgé,Abdennadher
, p. 1227 - 1228 (1991)
Divalent germanium derivatives (GeX2 and RGeX) were generated by direct reaction between germanium powder and various mercury(II) halides. Difluorogermylene was isolated by means of sublimation, while other halogermylenes (GeX2 and R
About the new mixed valent Ge7F16: [GeF6]2- octahedra between [Ge6F10]2+ sheets - A contribution to the stereochemical activity of lone pairs
Koehler,Chang
, p. 596 - 602 (2008/10/09)
For the first time Ge7F16 colourless transparent single crystals have been prepared by the reduction of GeF4 with Ge at 300°C. The extremely hygroscopic fluoride crystallizes in a new structure type in Cc with a = 1818.0(6) pm, b = 754.3(2) pm, c = 1030.4(3) pm, β = 90.33(3)° und Z = 4. Ge7F16 is a mixed valent fluoride according to 6GeF2×GeF4. Characteristical building units of the new structure type are [Ge6F10]2+ sheets, which are connected via [GeF6]2- octahedra. The Ge2+ within the sheets are coordinated by three nearest F- with distances of 183-218 pm and together with these form distorted trigonal pyramids. The structure of Ge7F16 can be considered as a member of the homologues series Gem4+Gen2+F4m+2n with m = 1 and n = 6. Bond order summations, band structure calculations and calculations of the Madelung part of the lattice energy, MAPLE, have been used for the discussion of the bonding situation.
Matrix Reactions of SiH4 and GeH4 with F2. Infrared Spectra of Several HF Product Complexes
McInnis, Thomas C.,Andrews, Lester
, p. 5276 - 5284 (2007/10/02)
Silane and germane were condensed with F2 at high dilution in argon on a 13 +/- 1 K substrate.Weak product complexes produced on condensation and increased by ultraviolet photolysis are assigned to SiH3F..HF, SiH2..HF or SiH2..(HF)2, and HSiF..HF.Annealing produced new bands due to F atom reactions that are attributed to SiH3..HF.The GeH3F molecule was observed in the similar GeH3F..HF complex.H-F vibrations in these complexes suggest that F is more basic in GeH3F than in SiH3F owing to the more electropositive nature of germanium as compared to silicon.
