Europium (III) borate

Crystal structure
	Eu [BO 3 ]
General
Surname	Europium (III) borate
other names	Europium (III) oxoborate Europium (III) oxoborate
Ratio formula	Eu [BO 3 ]
External identifiers / databases
Wikidata	Q90889144
properties
Molar mass	210.77 g · mol -1
Physical state	firmly
density	6.13 g cm −3
Melting point	1540 ± 20 ° C
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Europium (III) borate (Eu [BO ₃ ]) is a salt of europium and the borate - anion . In addition to the europium (III) borate, there is also the europium (II) borate (Eu ₃ [BO ₃ ] ₂ ).

Extraction and presentation

Europium (III) borate, via the reaction of boric acid with Europiumsesquioxid at 600-700 ° C are obtained.

{\ displaystyle {\ ce {Eu2O3 + 2 H3BO3 -> 2 Eu [BO3] + 3 H2O}}}

properties

Europium (III) borate crystallizes isotypically to vaterite hexagonal in the space group P 6 ₃ / mmc (space group no.194 ) with a = 384.2 pm and c = 893.7 pm and two formula units per unit cell . There also exists a metastable phase , the γ -Eu [BO ₃ ], which at 10 kbar can be produced and 1000 ° C. The metastable phase crystallizes triclinically with a = 621.9 (1), b = 646.8 (1), c = 646.6 (1), α = 93.10 °, β = 107.92 ° and γ = 107 , 79 ° with four formula units per unit cell. Europium (III) borate starts at 1540 ± 20 ° C melt . Eu [BO ₃ ] shows a Van Vleck paramagnetism . Template: room group / 194

Individual evidence

^ ^A ^b ^c R. E. Newnham, MJ Redman, RP Santoro: Crystal structure of yttrium and other rare-earth borates . In: Journal of the American Ceramic Society . tape 46 , 1963, pp. 253-256 , doi : 10.1111 / j.1151-2916.1963.tb11721.x .
^ ^A ^b E. M. Levin, RS Roth, JB Martin: Polymorphism of ABO ₃ Type Rare Earth Borates . In: Am. Mineral. tape 46 , 1961, pp. 1030-1055 ( minsocam.org [PDF]).
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
^ O. Reckeweg, Ch. Funk, FJ DiSalvo, Th. Schleid: New Insights into Eu ₃ [BO ₃ ] ₂ . In: Z. Anorg. General Chem. Band 642 , 2016, p. 1051 , doi : 10.1002 / zaac.201690018 .
↑ Ch. Funk: Structural, magnetic and spectroscopic characterization of di-, tri- and mixed-valent europium oxo compounds . Ed .: Dr. Hut publishing house. Munich 2019, ISBN 978-3-8439-4212-6 .
↑ ^a ^b H. J. Meyer: Triclinic Orthoborate of the rare earths . In: Natural Sciences . tape 59 , no. 5 , 1972, p. 215 , doi : 10.1007 / BF00595510 .
↑ Yusuke Takikawa, Shuji Ebisu, Shoichi Nagata: Van Vleck paramagnetism of the trivalent Eu ions . In: Journal of Physics and Chemistry of Solids . tape 71 , 2010, p. 1592–1598 , doi : 10.1016 / j.jpcs.2010.08.006 .

[:1-1] A ^b ^c R. E. Newnham, MJ Redman, RP Santoro: Crystal structure of yttrium and other rare-earth borates . In: Journal of the American Ceramic Society . tape 46 , 1963, pp. 253-256 , doi : 10.1111 / j.1151-2916.1963.tb11721.x .

[:0-2] A ^b E. M. Levin, RS Roth, JB Martin: Polymorphism of ABO ₃ Type Rare Earth Borates . In: Am. Mineral. tape 46 , 1961, pp. 1030-1055 ( minsocam.org [PDF]).

[NV-3] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[4] O. Reckeweg, Ch. Funk, FJ DiSalvo, Th. Schleid: New Insights into Eu ₃ [BO ₃ ] ₂ . In: Z. Anorg. General Chem. Band 642 , 2016, p. 1051 , doi : 10.1002 / zaac.201690018 .

[5] Ch. Funk: Structural, magnetic and spectroscopic characterization of di-, tri- and mixed-valent europium oxo compounds . Ed .: Dr. Hut publishing house. Munich 2019, ISBN 978-3-8439-4212-6 .

[:2-6] H. J. Meyer: Triclinic Orthoborate of the rare earths . In: Natural Sciences . tape 59 , no. 5 , 1972, p. 215 , doi : 10.1007 / BF00595510 .

[7] Yusuke Takikawa, Shuji Ebisu, Shoichi Nagata: Van Vleck paramagnetism of the trivalent Eu ions . In: Journal of Physics and Chemistry of Solids . tape 71 , 2010, p. 1592–1598 , doi : 10.1016 / j.jpcs.2010.08.006 .