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KBa7Mg2B14O28F5, a new borate with an unusual heptaborate group and double perovskite unit
1Beijing 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
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.
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