Lithium metaborate
Structural formula | ||||||||||
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General | ||||||||||
Surname | Lithium metaborate | |||||||||
other names |
Boric acid lithium salt |
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Molecular formula | LiBO 2 | |||||||||
Brief description |
white solid |
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properties | ||||||||||
Molar mass | 49.75 g mol −1 | |||||||||
Physical state |
firmly |
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density |
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Melting point |
845 ° C |
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solubility |
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Lithium metaborate is an inorganic chemical compound of lithium from the group of borates .
Extraction and presentation
Lithium metaborate can be obtained by reacting lithium carbonate with boric acid . It can also be obtained from mixtures of lithium oxide with boron trioxide .
properties
Lithium metaborate is a white solid that is sparingly soluble in water. The compound comes in two forms (α-LiBO 2 and γ-LiBO 2 ). α-LiBO 2 has an anhydrous monoclinic crystal structure that is stable at high temperatures. This consists of an endless laminar chain of [BO 3 ] 1 triangles with Li-O bonds between the chains. The lattice parameters of this phase are a = 5.838 Å, b = 4.348 Å, c = 6.449 Å and β = 115.121 °. In contrast, γ-LiBO 2 has a tetragonal structure with the lattice parameters a = 4.1961 Å and c = 6.5112 Å.
use
A mixture of lithium metaborate and lithium tetraborate is suitable for dissolving most inorganic oxides in order to enable spectrochemical analysis. It is also used as a flux in glass and ceramic manufacturing.
Individual evidence
- ↑ a b c d e f data sheet Lithium metaborate, 99.995% trace metals basis at Sigma-Aldrich , accessed on September 4, 2017 ( PDF ).
- ↑ a b c CRC Handbook of Chemistry and Physics, 96th Edition . CRC Press, 2015, ISBN 978-1-4822-6097-7 ( books.google.de ).
- ↑ a b c data sheet Lithium metaborate, Puratronic®, 99.997% (metals basis) from AlfaAesar, accessed on September 4, 2017 ( PDF )(JavaScript required) .
- ↑ a b Román-Tejeda, A. & Pfeiffer: α → γ Lithium borate phase transition produced during the CO 2 chemisorption process . In: Journal of Thermal Analysis and Calorimetry . tape 110 , no. 2 , 2012, ISSN 1388-6150 , p. 807-811 , doi : 10.1007 / s10973-011-1997-4 .
- ^ Lithium: supplementary volume . Springer-Verlag, 2013, ISBN 978-3-662-12268-6 , pp. 490 ( books.google.de ).
- ^ A Manual for the Chemical Analysis of Metals . ASTM International, S. 86 ( books.google.de ).
- ↑ Handbook of Inorganic Compounds . CRC Press, 1995, ISBN 978-0-8493-8671-8 ( books.google.de ).