hardness ntawm iav

Raws li Mohs hardness scale, lub hardness ntawm iav yog 6.5. Qhov siab dua qhov hardness, qhov zoo dua qhov hnav tsis kam. Feem ntau siv hardness ntsuas yog Brinell hardness, Rockwell hardness thiab Vickers hardness.

Lub molecular kev npaj ntawm iav yog random, thiab nws cov molecules yog statisticically uniform nyob rau hauv qhov chaw. Nyob rau hauv cov xwm txheej zoo tagnrho, lub cev thiab tshuaj lom neeg ntawm cov iav homogeneous (xws li refractive index, hardness, elastic modulus, coefficient ntawm thermal expansion, thermal conductivity, hluav taws xob conductivity, thiab lwm yam) yog tib yam nyob rau hauv tag nrho cov lus qhia.