摘要
首次用 LnBr_3·6H_2O-NH_4Br(Ln=Sm、Yb)脱水制备了无水 SmBr_3和 YbBr_3。经热分析、相分析和化学分析得:Ln/NH_4Br 为1/6.3。0.13Pa 氩氛下真空控温脱水。升温速度1～1.6℃/min,由298～673K 分段升温及保温。产物为 SmBr_3(Sm 38.52%,Br 61.23%)和 YbBr_3(Yb 41.81%,Br57.59%)纯相。产率92～94%。并报道了产物的 DTA 及晶胞参数。
This work reports the procedure of preparinganhydrous SmBr_3 and YbBr_3 for the first timethrough dehydration of LhBr_3·6H_2O-NH_4Br(Ln=Sm,Yb)mixture.Ln/NH_4Br was in 1/6.3 molarratio.Dehydration was done in vacuum(0.13 Pa,Ar).The speed,of temp.raise was 1 or 1.6℃/min.From 298 to 673K the temp was raised and con-trolled in many steps.SmBr_3(Sm 38.52%,Br61.23%)and YbBr_3(Yb 41.81%,Br 57.59%)were obtained in a yield of 92～94%.Addition-aily the DTA and the crystal lattice parametersof the products are reported.
出处
《化学试剂》
CAS
CSCD
北大核心
1991年第1期13-14,28,共3页
Chemical Reagents
