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Na 3 B 3 O 3 F 6 : Synthesis, Crystal Structure, and Ionic Conductivity
Author(s) -
Cakmak Güliz,
Pilz Thomas,
Jansen Martin
Publication year - 2012
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201200171
Subject(s) - crystallography , sodium , ring (chemistry) , ion , crystal structure , ionic conductivity , ionic bonding , group (periodic table) , materials science , planar , chemistry , analytical chemistry (journal) , organic chemistry , computer graphics (images) , electrode , computer science , electrolyte
Crystalline Na 3 B 3 O 3 F 6 was synthesized from H 3 BO 3 and NaBF 4 at 623 K, alternatively NaBO 2 can be reacted with NaBF 4 at 673 K. The title compound ( C 2/ c , a = 11.866(7), b = 6.901(4), c = 9.367(6) Å, β = 113.724(9)°) contains the cyclo‐fluorooxotriborate anion B 3 O 3 F 6 3– , which displays a planar B 3 O 3 ring. Within the margins of experimental error, its point group symmetry is D 3 h . Layers of fluorinated boroxine rings and sodium atoms are stacked in an alternating manner in parallel to the ab plane. The novel sodium fluorooxoborate is a poor sodium ion conductor with conductivities of 8.7 × 10 –5 and 3.6 × 10 –3 S · cm –1 at 523 and 623 K, respectively.