Niobium (III) fluoride
Crystal structure | ||||||||||
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__ Nb 3+ __ F - | ||||||||||
General | ||||||||||
Surname | Niobium (III) fluoride | |||||||||
other names |
Niobium trifluoride |
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Ratio formula | NbF 3 | |||||||||
Brief description |
blue to black solid |
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External identifiers / databases | ||||||||||
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properties | ||||||||||
Molar mass | 149.9 g mol −1 | |||||||||
Physical state |
firmly |
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density |
4.02 g cm −3 |
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Melting point |
570 ° C (decomposition) |
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solubility |
soluble in hydrofluoric acid |
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safety instructions | ||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Niobium (III) fluoride is a chemical compound of niobium from the group of fluorides .
Extraction and presentation
Niobium (III) fluoride can be obtained by reacting niobium with hydrogen fluoride at 225 ° C. The compound can also be obtained by reducing niobium (V) fluoride with niobium at 750 ° C. and high pressure or by reacting niobium hydride with a hydrogen fluoride-hydrogen mixture.
properties
Niobium (III) fluoride is a blue to black solid. The compound is a semiconductor and has a cubic crystal structure of the rhenium trioxide type with the space group Pm 3 m (space group no. 221) .
Individual evidence
- ↑ a b c d e R. Blachnik: Pocket book for chemists and physicists Volume 3: Elements, inorganic compounds and materials, minerals . Springer-Verlag, 2013, ISBN 978-3-642-58842-6 , pp. 632 ( limited preview in Google Book search).
- ^ A b William M. Haynes: CRC Handbook of Chemistry and Physics, 97th Edition . CRC Press, 2016, ISBN 978-1-4987-5429-3 , pp. 106 ( limited preview in Google Book search).
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
- ^ AP Hagen: Inorganic Reactions and Methods, The Formation of Bonds to Halogens . John Wiley & Sons, 2009, ISBN 0-470-14539-0 , pp. 178 ( limited preview in Google Book search).
- ↑ Jane E. Macintyre: Dictionary of Inorganic Compounds . CRC Press, 1992, ISBN 978-0-412-30120-9 , pp. 3168 ( limited preview in Google Book search).
- ^ JH Simons: Fluorine Chemistry . Elsevier, 2012, ISBN 0-323-14724-0 , pp. 48 ( limited preview in Google Book search).
- ↑ subgroup elements, lanthanides, actinides, transactinides Volume 2: transition elements, lanthanides, actinides, transactinide attachments . Walter de Gruyter GmbH & Co KG, 2016, ISBN 978-3-11-049339-9 ( limited preview in the Google book search).