Lithium metaborate

Structural formula
	No drawing available
General
Surname	Lithium metaborate
other names	Boric acid lithium salt
Molecular formula	LiBO 2
Brief description	white solid
External identifiers / databases
ECHA InfoCard	100.033.287
PubChem	123308
Wikidata	Q3080967
properties
Molar mass	49.75 g mol −1
Physical state	firmly
density	2.18 g cm −3 ; 1.8 g cm −3 (dihydrate);
Melting point	845 ° C
solubility	soluble in ethanol and slightly soluble in water (25.7 g l −1 at 20 ° C); soluble in water (dihydrate);
safety instructions
GHS labeling of hazardous substances	no GHS pictograms
	no GHS pictograms
H and P phrases	H: no H-phrases
	P: no P-phrases
	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 .

{\ displaystyle {\ ce {Li2CO3 + 2H3BO3 -> 2LiBO2 + CO2 + 3H2O}}}

{\ displaystyle {\ ce {Li2O + 2B2O3 -> 2LiBO2}}}

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 ).

[Sigma-1] ↑ ^a ^b ^c ^d ^e ^f data sheet Lithium metaborate, 99.995% trace metals basis at Sigma-Aldrich , accessed on September 4, 2017 ( PDF ).

[crc-2] CRC Handbook of Chemistry and Physics, 96th Edition . CRC Press, 2015, ISBN 978-1-4822-6097-7 ( books.google.de ).

[Alfa-3] ta sheet Lithium metaborate, Puratronic®, 99.997% (metals basis) from AlfaAesar, accessed on September 4, 2017 ( PDF )(JavaScript required) .

[Román-Tejeda,_A._&_Pfeiffer-4] 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 .

[5] Lithium: supplementary volume . Springer-Verlag, 2013, ISBN 978-3-662-12268-6 , pp. 490 ( books.google.de ).

[6] A Manual for the Chemical Analysis of Metals . ASTM International, S. 86 ( books.google.de ).

[7] Handbook of Inorganic Compounds . CRC Press, 1995, ISBN 978-0-8493-8671-8 ( books.google.de ).