The single crystals Li₂W_0.85Mo_0.15O₄ and Li₂W_0.9Mo_0.1O₄ have been grown by a low-temperature-gradient Czochralski technique as representatives of promising materials for scintillating cryogenic bolometers. Thermodynamic properties and their relationship with structural parameters to improve and extend the device portfolio with special emphasis on formation enthalpies, thermodynamic stability, and lattice enthalpies have been revealed. Solution enthalpies of Li₂CO₃, MoO₃, and Li₂W_0.85Mo_0.15O₄ and Li₂W_0.9Mo_0.1O₄ single crystals have been measured in 0.40162 mol kg^–1 aqueous KOH. The standard formation enthalpies (Δ_fH⁰ (Li₂W_0.85Mo_0.15O₄, s, 298.15 K) = −1590.8 ± 2.0 kJ mol^–1; Δ_fH⁰ (Li₂W_0.9Mo_0.1O₄, s, 298.15 K) = −1594.1 ± 2.3 kJ mol^–1), formation enthalpies from simple oxides, and lattice enthalpies have been determined. As a result, the dependences of formation enthalpies and lattice enthalpies for Li₂W_1–xMo_xO₄ on tolerance factors have been found to be linear. It has been discovered that the thermodynamic stability and lattice enthalpies of Li₂W_1–xMo_xO₄ are increased when the tolerance factor tends to one. It has been established that single crystals Li₂W_0.85Mo_0.15O₄ and Li₂W_0.9Mo_0.1O₄ are several times more thermodynamically stable than ZnMoO₄ and CdWO₄.

中文翻译：

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钼掺杂钨酸锂单晶的热力学研究（Li ₂ W _{1– x} Mo _x O ₄，x = 0.1和0.15）

通过低温梯度直拉法生长单晶Li ₂ W _0.85 Mo _0.15 O ₄和Li ₂ W _0.9 Mo _0.1 O ₄作为闪烁体低温辐射热计的有前途的材料的代表。已经揭示了热力学性质及其与结构参数的关系，以改善和扩展器件产品组合，其中特别强调了形成焓，热力学稳定性和晶格焓。Li ₂ CO ₃，MoO ₃和Li ₂ W _0.85 Mo _0.15的溶液焓在0.40162 mol kg ^–1的KOH水溶液中测量了O ₄和Li ₂ W _0.9 Mo _0.1 O ₄单晶。标准形成焓（_Δf H ⁰（Li ₂ W _0.85 Mo _0.15 O ₄，s，298.15 K）= −1590.8±2.0 kJ mol ^–1 ; _Δf H ⁰（Li ₂ W _0.9 Mo _0.1 O ₄，s， 298.15 K）= −1594.1±2.3 kJ mol ^–1），已经确定了由简单氧化物形成的焓和晶格焓。结果，发现Li ₂ W _{1– x} Mo _x O ₄的形成焓和晶格焓与公差因子的关系是线性的。已经发现，当容差因子趋于1时，Li ₂ W _{1– x} Mo _x O ₄的热力学稳定性和晶格焓增加。已经确定单晶Li ₂ W _0.85 Mo _0.15 O ₄和Li ₂ W _0.9 Mo_0.1 O ₄的热力学稳定性是ZnMoO ₄和CdWO _4的几倍。