Europium (II) borate

Crystal structure
	No drawing available
General
Surname	Europium (II) borate
other names	Europium (II) ortho oxoborate;
Ratio formula	Eu 3 [BO 3 ] 2
Brief description	lemon yellow solid
External identifiers / databases
Wikidata	Q89414265
properties
Molar mass	573.51 g mol −1
Physical state	firmly
density	6.453 g cm −3
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 (II) borate (Eu ₃ [BO ₃ ] ₂ ) is a salt of europium and the borate - anion . In addition to the europium (II) borate, there is also the europium (III) borate (Eu [BO ₃ ]).

Extraction and presentation

Europium (II) borate can be produced from europium sesquioxide with elemental boron and boron oxide via a borothermal reduction . ${\ displaystyle {\ ce {3 Eu2O3 + 2 B + B2O3 -> 2 Eu3 [BO3] 2}}}$

During this reaction , the elemental boron is oxidized and the europium is reduced.

properties

Europium (II) borate is ferromagnetic below 7.5 K. Europium (II) borate crystallizes isotypically to Takedait trigonal in the space group R 3 c (space group no.167 ) with a = 906.89 (3) pm and c = 1254.03 (5) pm with six formula units per unit cell . The compound begins at at 210 ° C air to oxidize . Template: room group / 167

Individual evidence

↑ ^a ^b ^c ^d ^e Ch. Funk: Structural, magnetic and spectroscopic characterization of di-, tri- and mixed-valent europium oxo compounds . Dr. Hut Verlag, Munich 2019, ISBN 978-3-8439-4212-6 .
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
^ RE Newnham, MJ Redman, RP Santoro: Crystal Structure of Yttrium and Other Rare ‐ Earth Borates . Ed .: Journal of the American Ceramic Society . tape 46 , 1963, pp. 253-256 , doi : 10.1111 / j.1151-2916.1963.tb11721.x .
↑ K.-I. Machida, G.-Y. Adachi, H. Hata, J. Shiokawa: The Crystal Structure and Magnetic Property of Europium (II) Orthoborate . In: Bull. Chem. Soc. Jpn. tape 54 , 1981, pp. 1052-1055 , doi : 10.1246 / bcsj.54.1052 .
↑ W. Schuckmann: Crystal structure of calcium borate [Ca ₃ (BO ₃ ) ₂ ] . In: New Jb. Miner. Mh. Band 3 , 1969, p. 142-144 .
^ 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 .

[:0-1] Ch. Funk: Structural, magnetic and spectroscopic characterization of di-, tri- and mixed-valent europium oxo compounds . Dr. Hut Verlag, Munich 2019, ISBN 978-3-8439-4212-6 .

[NV-2] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[3] RE Newnham, MJ Redman, RP Santoro: Crystal Structure of Yttrium and Other Rare ‐ Earth Borates . Ed .: Journal of the American Ceramic Society . tape 46 , 1963, pp. 253-256 , doi : 10.1111 / j.1151-2916.1963.tb11721.x .

[4] K.-I. Machida, G.-Y. Adachi, H. Hata, J. Shiokawa: The Crystal Structure and Magnetic Property of Europium (II) Orthoborate . In: Bull. Chem. Soc. Jpn. tape 54 , 1981, pp. 1052-1055 , doi : 10.1246 / bcsj.54.1052 .

[5] W. Schuckmann: Crystal structure of calcium borate [Ca ₃ (BO ₃ ) ₂ ] . In: New Jb. Miner. Mh. Band 3 , 1969, p. 142-144 .

[6] 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 .