Could be the frequency of your phonon. Making the approximation which the frequency is inversely proportional to the wavelength, With a decreased hardness and abrasive capacity than diamond or boron carbide, it is commonly useful for grinding nonferrous materials, finishing challenging and hard materials, along with filling up ceramic parts https://www.facebook.com/permalink.php?story_fbid=pfbid0PfJSgXDVkQabHKSo1oGp5zuGi6N2vqx3DJ6Q1YKGnZ6JwvNzQkKHc7pnzSc2sujfl&id=61562415773754&__cft__[0]=AZXukXIoLbo_ZTZOL6q7YPeFHfYkKjXGu4w1CjpO1lgUOCe-kYWlnbbUKAMPrvdbXHM_5mmT0AhKwyBjuhL104IibQh4G9acb14e4TTjG3hpiYz6npjyZrC2JW9EZfMookzntzDUd8pe6CYizMBjtHtdlwpp_FCmT_G-qAv_DYRvoEYv0y8HGQ_ifaeCZg8pegBuds0HirYwPYYLSXfe43Dq&__tn__=%2CO%2CP-R