The elastic properties of C_(60) fullerite samples synthesized under pressure P = 13.0 GPa at high temperatures were investigated using acoustic microscopy. The velocities of longitudinal (c_L = 17 - 26 km/s) and transverse (c_T = 7.2 - 9.6 km/s) elastic waves in the samples were measured. It was established that the longitudinal sound velocity of ultrahard fullerites is higher than that of any other known solid. The bulk modulus of these ultrahard samples is higher than that of diamond and reaches a value greater than 1 TPa. The high bulk modulus, the relatively large shear moduli, and the substantial Poisson ratio indicate that the structure of the ultrahard fullerites is fundamentally different from that of diamond.
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机译：使用声学显微镜研究了在高压P = 13.0 GPa下合成的C_（60）富勒岩样品的弹性性能。测量了样品中纵向（c_L = 17-26 km / s）和横向（c_T = 7.2-9.6 km / s）弹性波的速度。已经确定，超硬富勒岩的纵向声速高于任何其他已知固体的纵向声速。这些超硬样品的体积模量高于金刚石，并达到大于1 TPa的值。较高的体积模量，较大的剪切模量和较大的泊松比表明超硬富勒岩的结构与金刚石基本不同。
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