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High-pressure Syntheses and Characterization of the Rare-earth Fluoride Borates RE 2 (BO 3 )F 3 (RE=Tb, Dy, Ho)

High-pressure Syntheses and Characterization of the Rare-earth Fluoride Borates RE 2 (BO 3 )F 3... The new rare-earth fluoride borates RE 2 (BO 3 )F 3 (RE=Tb, Dy, Ho) were synthesized under highpressure/ high-temperature conditions of 1:5 GPa=1200 °C for Tb 2 (BO 3 )F 3 and 3:0 GPa=900 °C for Dy 2 (BO 3 )F 3 and Ho 2 (BO 3 )F 3 in a Walker-type multianvil apparatus from the corresponding rareearth sesquioxides, rare-earth fluorides, and boron oxide. The single-crystal structure determinations revealed that the new compounds are isotypic to the known rare-earth fluoride borate Gd 2 (BO 3 )F 3 . The new rare-earth fluoride borates crystallize in the monoclinic space group P2 1 /c (Z = 8) with the lattice parameters a=16:296(3), b=6:197(2), c=8:338(2) Å , b =93:58(3)° for Tb 2 (BO 3 )F 3 , a= 16:225(3), b = 6:160(2), c = 8:307(2) Å , b = 93:64(3)° for Dy 2 (BO 3 )F 3 , and a = 16:189(3), b = 6:124(2), c = 8:282(2) Å , β= 93:69(3)° for Ho 2 (BO 3 )F 3 . The four crystallographically different rare-earth cations (CN=9) are surrounded by oxygen and fluoride anions. All boron atoms form isolated trigonal-planar (BO 3 ) 3- groups. The six crystallographically different fluoride anions are in a nearly planar coordination by three rare-earth cations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Zeitschrift für Naturforschung B de Gruyter

High-pressure Syntheses and Characterization of the Rare-earth Fluoride Borates RE 2 (BO 3 )F 3 (RE=Tb, Dy, Ho)

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References (2)

Publisher
de Gruyter
Copyright
Copyright © 2013 by the
ISSN
0932-0776
eISSN
1865-7117
DOI
10.5560/znb.2013-3258
Publisher site
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Abstract

The new rare-earth fluoride borates RE 2 (BO 3 )F 3 (RE=Tb, Dy, Ho) were synthesized under highpressure/ high-temperature conditions of 1:5 GPa=1200 °C for Tb 2 (BO 3 )F 3 and 3:0 GPa=900 °C for Dy 2 (BO 3 )F 3 and Ho 2 (BO 3 )F 3 in a Walker-type multianvil apparatus from the corresponding rareearth sesquioxides, rare-earth fluorides, and boron oxide. The single-crystal structure determinations revealed that the new compounds are isotypic to the known rare-earth fluoride borate Gd 2 (BO 3 )F 3 . The new rare-earth fluoride borates crystallize in the monoclinic space group P2 1 /c (Z = 8) with the lattice parameters a=16:296(3), b=6:197(2), c=8:338(2) Å , b =93:58(3)° for Tb 2 (BO 3 )F 3 , a= 16:225(3), b = 6:160(2), c = 8:307(2) Å , b = 93:64(3)° for Dy 2 (BO 3 )F 3 , and a = 16:189(3), b = 6:124(2), c = 8:282(2) Å , β= 93:69(3)° for Ho 2 (BO 3 )F 3 . The four crystallographically different rare-earth cations (CN=9) are surrounded by oxygen and fluoride anions. All boron atoms form isolated trigonal-planar (BO 3 ) 3- groups. The six crystallographically different fluoride anions are in a nearly planar coordination by three rare-earth cations.

Journal

Zeitschrift für Naturforschung B – de Gruyter

Published: Nov 1, 2013

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