Low-temperature thermal effects in lithium/ammonia-d3 systems
Low-temperature thermal effects in lithium/ammonia-d3 systems
复制标题
锂/氨-d3 系统中的低温热效应
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
N. Mammano
中科院分区：
文献类型：
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作者：
L. V. Coulter;J. Gibson;N. Mammano
测定了Li/ND/sub 3/体系在18 ~ 45%摩尔金属（MPM）之间的共晶（或共晶）转变焓变和体系的热容。转变温度略微取决于组成，并且发生在88.366 +/- 0.003或88.395 +/- 0.003K，其已被暂时分别确定为共晶或共晶/包晶转变温度。比较了Li/NH/sub 3/和Li/ND/sub 3/中没有固-固转变的情况。它的结论是，整体的无序效果，每摩尔的四胺，与固体到固体的转变在Li/NH/sub 3/系统是类似的熔融的低共熔混合物含有一摩尔的Li（ND/sub 3/）/sub 4/支持以前的建议，固体到固体的转变在Li/NH/sub 3/系统是一个有序-无序的转变。
The enthalpy changes associated with the eutectic (or peritectic) transitions in Li/ND/sub 3/ systems between 18 and 45% mole metal (MPM) and the heat capacities of the systems have been determined. The transition temperature depends slightly on composition and occurs at 88.366 +/- 0.003 or 88.395 +/- 0.003K which has been tentatively identified as eutectic or eutectic/peritectic transition temperatures, respectively. The absence of the solid-to-solid transition found in Li/NH/sub 3/ and Li/ND/sub 3/ are compared. It is concluded that the overall disordering effect, per mole of tetrammine, associated with the solid-to-solid transition in the Li/NH/sub 3/ system is similar to the melting of a eutectic mix containing one mole of Li(ND/sub 3/)/sub 4/ supporting previous suggestions that the solid-to-solid transition in the Li/NH/sub 3/ system is an order-disorder transition.