|
Atomistry » Thallium » Chemical Properties » Thallous fluoride | ||
Atomistry » Thallium » Chemical Properties » Thallous fluoride » |
Thallous fluoride, TlF
Thallous fluoride, TlF, is prepared by dissolving thallous hydroxide, carbonate, or sulphide in aqueous hydrofluoric acid, evaporating to dryness, heating to remove hydrogen fluoride, and crystallising the residue from water. It may also be prepared by heating thallous oxide or carbonate to dull redness in a stream of dry hydrogen fluoride. Thallium dissolves slowly in aqueous hydrofluoric acid.
Thallous fluoride is readily soluble in water, from which it crystallises in colourless, lustrous, regular octahedra. At a red heat it may be distilled in a current of hydrogen fluoride. It is insoluble in alcohol and in liquid ammonia; the aqueous solution has an acid reaction. The monohydrate, TlF.H2O, is said to separate in monoclinic crystals from a solution of thallous carbonate in aqueous hydrofluoric acid; and thallium hydrogen fluoride, TlF.HF, crystallises out in regular octahedra when a solution of thallous fluoride in concentrated aqueous hydrofluoric acid is evaporated over sulphuric acid. The acid fluoride is stable at 100°, but decomposes at higher temperatures (Buchner). Aluminium thallous fluoride, 2AlF3.3TlF, and numerous other double fluorides have been prepared. |
Last articlesZn in 8WB0Zn in 8WAX Zn in 8WAU Zn in 8WAZ Zn in 8WAY Zn in 8WAV Zn in 8WAW Zn in 8WAT Zn in 8W7M Zn in 8WD3 |
© Copyright 2008-2020 by atomistry.com | ||
Home | Site Map | Copyright | Contact us | Privacy |