It has been shown that the heat capacity of argentite β-Ag₂S, which is nanocrystalline superionic silver sulfide, includes an additional positive contribution caused by the existence of the lower and upper bounds of the phonon spectrum because of a small size of particles. The estimate of this contribution from experimental data on the difference of the heat capacities of nano- and coarse-crystalline argentite β-Ag₂S in the region of its existence 470–850 K makes it possible to determine for the first time the velocities of propagation of longitudinal and transverse elastic oscillations c_l and c_t and the elastic rigidity constants c₁₁, c₁₂, and c₄₄. It has been found that an increase in the temperature results in a decrease in the elastic characteristics of argentite. The directions of the crystal lattice of argentite corresponding to the maximum and minimum elastic moduli have been determined.

它已经显示，辉银矿β-Ag的热容量₂ S，这是纳米晶体超离子硫化银，包括由声子谱的，因为颗粒的小尺寸的下界和上界的存在的额外的积极贡献。从实验数据这一贡献上的纳米和粗晶辉银矿β-Ag的热容量的差的估计₂ S IN其存在的区域470-850ķ使得能够确定用于第一时间的速度纵向和横向弹性振荡c _l和c _t的传播以及弹性刚度常数c ₁₁，c ₁₂，以及c ₄₄。已经发现，温度的升高导致银辉石的弹性特性降低。已经确定了对应于最大和最小弹性模量的银辉石的晶格方向。