Taw qhia rau Graphite
Feb 10, 2021
Qhov kev ncua deb ntawm txhua txheej ntawm graphite yog 3.40Å, uas yog ua ke los ntawm van der Waals quab yuam, uas yog, cov khaubncaws sab nraud povtseg yog molecular crystals.
Qhov kev ncua deb ntawm carbon atoms nyob rau hauv tib txheej yog 1.42Å, vim hais tias cov pa roj carbon atoms nyob rau tib lub dav hlau txheej Intermolecular daim ntawv cog lus muaj zog heev thiab tsis yooj yim rau tawg, yog li ntawd lub melting point ntawm graphite kuj siab heev, thiab cov tshuaj muaj pes tsawg leeg. kuj ruaj khov. Raws li nws txoj kev sib txuas tshwj xeeb, nws tsis tuaj yeem suav tias yog ib qho siv lead ua lossis polycrystal ib leeg. Tam sim no nws yog feem ntau suav hais tias graphite yog ib hom sib xyaw siv lead ua.
Graphite belongs rau hexagonal siv lead ua system nrog ua tiav txheej txheej cleavage. Lub cleavage nto yog dominated los ntawm molecular daim ntawv cog lus, uas tsis muaj zog attraction rau molecules, yog li nws lub ntuj floatability yog zoo heev.
