KBa7Mg2B14O28F5, a new borate with an unusual heptaborate group and double perovskite unit

R K Li; Peng Chen

doi:10.1107/S0108270109054341

KBa7Mg2B14O28F5, a new borate with an unusual heptaborate group and double perovskite unit

Acta Crystallogr C. 2010 Jan;66(Pt 1):i7-8. doi: 10.1107/S0108270109054341. Epub 2009 Dec 24.

Authors

R K Li¹, Peng Chen

Affiliation

¹ Beijing Center for Crystal Research and Development, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China. rkli@mail.ipc.ac.cn

PMID: 20048410
DOI: 10.1107/S0108270109054341

Abstract

A new borate, potassium barium magnesium borate fluoride, KBa(7)Mg(2)B(14)O(28)F(5), with a nominal 7:1 composition of BaB(2)O(4) to KMg(2)F(5), has been found during the growth of BaMgBO(3)F crystals with a KF flux. It crystallized in the space group C2/c and is composed of isolated heptaborate [B(7)O(14)](7-) groups and double perovskite [Mg(2)O(6)F(5)](13-) units.