β Scribed by Q. D. Zeng; R. K. Li
No coin nor oath required. For personal study only.
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 Β°C, 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 Β°C. K2La2(BO3)2O crystallizes in the monoclinic space group P21/c with Z = 4 and has a layered structure consisting of tightly bound [La 2 (BO 3 ] layers with K + located in the interlayer space. The K2La2(BO3)2O crystal is transparent from 215 to 2750 nm with an UV absorption edge of about 210 nm. -(ZENG, Q. D.; LI*,
π SIMILAR VOLUMES
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 Β°C, 1 d). Single crystals are grown using KF and B2O3 as flux. KBaY(BO3)2 crystallizes in the trigonal
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