Pob zeb diamond vs Graphite
Pob zeb diamond thiab graphite, txawm hais tias lawv ob leeg yog tib yam tshuaj, tab sis lawv qhia qhov sib txawv ntawm lawv. Lawv ob leeg yog tsim los ntawm carbon, tab sis lawv txawv thaum nws los txog rau lawv lub cev tsos. Yog li lawv tuaj yeem hu ua polymorphs.
Lawv hu ua polymorphs vim qhov tseeb tias lawv tau ua los ntawm tib yam tshuaj tab sis lawv txawv ntawm lawv lub cev. Graphite yog xim hlau thiab opaque whereas pob zeb diamond yog ci ntsa iab thiab pob tshab.
Ob leeg sib txawv ntawm lawv qhov nyuaj thiab. Graphite yog suav tias yog mos heev thiab muaj qhov tawv ntawm 1 txog 2 ntawm Mohs Hardness Scale. Ntawm qhov tod tes, pob zeb diamond paub tias yog cov khoom siv ntuj tshaj plaws. Qhov tseeb nws tau hais tias muaj qhov nyuaj ntawm 10 ntawm Mohs Hardness Scale. Nws yuav tsum raug sau tseg tias tsis muaj lwm yam khoom muaj zog ntawm pob zeb diamond.
Graphite yog siv los ua roj nplua nyeem thiab siv los ua xaum xaum. Nws yog qhov nthuav kom nco ntsoov tias lub cev zoo li pob zeb diamond yog vim nws cov qauv siv lead ua ntuj.
Ib qho ntawm qhov sib txawv tseem ceeb ntawm pob zeb diamond thiab graphite yog txoj kev uas lawv cov molecular kev npaj tau ua. Nyob rau hauv cov pob zeb diamond, txhua cov pa roj carbon atom muaj kev sib raug zoo rau plaub cov pa roj carbon atoms uas nyob ib sab. Tej zaum qhov no yog vim li cas tom qab nws hardness.
Nyob rau hauv cov ntaub ntawv ntawm graphite tus neeg atoms txuas nrog ib leeg los tsim cov nplooj ntawv ntawm carbon atoms. Nyob rau hauv txhua daim ntawv ntawm carbon atoms, txhua carbon atom yog bonded rau peb cov atoms carbon atoms.
Lwm qhov sib txawv tseem ceeb ntawm cov qauv sab hauv ntawm ob yam khoom yog tias tsis muaj cov hluav taws xob dawb mus taug kev los ntawm cov qauv hauv pob zeb diamond thiab yog li lawv tau hais tias yog cov insulators zoo. Ntawm qhov tod tes, dawb electrons mus los ntawm cov qauv hauv graphite. Pob zeb diamond yog tus cwj pwm los ntawm qhov ntsuas siab ntawm kev cuam tshuam ib yam nkaus.
