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ChemInform Abstract: A Buetschliite-Type Rare-Earth Borate, KBaY(BO3)2.

โœ Scribed by Jianhua Gao; Limei Song; Xiaoyun Hu; Dekai Zhang

Publisher
John Wiley and Sons
Year
2011
Weight
22 KB
Volume
42
Category
Article
ISSN
0931-7597

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โœฆ Synopsis

A Buetschliite-Type Rare-Earth Borate, KBaY(BO 3 ) 2 . -The new title compound is synthesized by solid state reaction of a stoichiometric mixture of K2CO3, BaCO3, Y2O3, and H3BO3 (Pt crucible, 920 ยฐC, 1 d). Single crystals are grown using KF and B2O3 as flux. KBaY(BO3)2 crystallizes in the trigonal space group R3m with Z = 3 (single crystal XRD) and is isotypical with the mineral buetschliite, K2Ca(CO3)2. The structure consists of [YB 2 O 6 ] โˆž double layers constructed by corner-sharing YO 6 and BO 3 groups. Ba/K atoms occupy the spaces between these two layers and play the role of bridges. Eu 3+ doped KBaY(BO3)2 exhibits strong orange-red light emission under 265 nm excitation. -(GAO*,

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โœ Q. D. Zeng; R. K. Li ๐Ÿ“‚ Article ๐Ÿ“… 2011 ๐Ÿ› John Wiley and Sons โš– 22 KB ๐Ÿ‘ 1 views

Powder samples of K2Ln2(BO3)2O (Ln: La, Nd, Sm, Eu) are prepared by solid state reaction of K2CO3, Ln2O3, and H3BO3 (Pt crucible, 840-900 ยฐC, 48 h). Single crystals of K2La2(BO3)2O are obtained by spontaneous crystallization from a melt of K2CO3, La2O3, H3BO3, and KF as a flux at 1050 ยฐC. K2La2(BO3)