制备了一种新型非线性光学晶体:二甲亚砜合硫氰酸汞锰(分子式:MnHg(SCN)4(C2H6SO)2,简称MMTD).用热重法、差热分析法、差示扫描量热法、热机械分析法、分光光度法和红外光谱研究了它的热学和光学性质.MMTD晶体具有较好的物理化学稳定性.在27℃时,它的比热为699.5 J/mol·℃.晶体的热膨胀系数为α1=5.33×10-5/℃,α2=4.51×10-5/℃,α3=3.10×10-5/℃.MMTD晶体的截止波长为375nm;透光波段为375-2560 nm.MMTD晶体在标准紫光波长404nm的透过率为44.18%,高于硫氰酸汞锰(MMTC)晶体.
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