Crystal vs Diamond
Ntawm ntau hom siv lead ua, pob zeb diamond yog ib qho ntawm cov muaju uas tau tsim los ntawm cov pa roj carbon. Yog li ntawd, pob zeb diamond muaj ntau yam zoo sib xws ntawm cov siv lead ua.
Crystal
Crystals yog cov khoom, uas tau txiav txim cov qauv thiab sib luag. Cov atoms, molecules los yog ions nyob rau hauv crystals yog teem nyob rau hauv ib tug tshwj xeeb yam, yog li muaj ib tug ntev kev txiav txim. Crystals yog ib txwm tshwm sim nyob rau hauv lub ntiaj teb li loj crystalline pob zeb, xws li quartz, granite. Crystals yog tsim los ntawm cov kab mob muaj sia thiab. Piv txwv li, calcite yog tsim los ntawm mollusks. Muaj dej raws li muaju nyob rau hauv daim ntawv ntawm cov daus, dej khov los yog glaciers.
Crystals tuaj yeem faib raws li lawv lub cev thiab tshuaj lom neeg. Lawv yog covalent crystals (xws li pob zeb diamond), metallic crystals (xws li pyrite), ionic crystals (xws li sodium chloride), thiab molecular crystals (xws li qab zib). Crystals tuaj yeem muaj cov duab sib txawv thiab xim. Crystals muaj cov txiaj ntsig zoo nkauj, thiab tseem ntseeg tau tias muaj cov khoom zoo; yog li cov neeg siv lawv los ua cov hniav nyiaj hniav kub. Tsis tas li ntawd, tib neeg siv cov khoom siv lead ua zoo li quartz los ua iav, moos thiab qee qhov hauv computer.
Los ntawm txhais, ib lub siv lead ua yog "homogenous chemical compound nrog ib txwm thiab ncua sij hawm ntawm atoms. Piv txwv yog halite, ntsev (NaCl), thiab quartz (SiO2). Tab sis cov khoom siv lead ua tsis txwv rau cov zaub mov: lawv suav nrog cov khoom tseem ceeb xws li qab zib, cellulose, hlau, pob txha thiab txawm tias DNA."
pob zeb diamond
Pob zeb yog pob zeb muaj nuj nqis, thiab nws yog lub pob zeb nrov tshaj plaws. Pob zeb diamond yog ib qho allotrope ntawm carbon. Cov pa roj carbon atoms yog tetrahedrally sib koom ua ke los tsim cov pob zeb diamond lattice. Txhua carbon yog, yog li ntawd, sp3 hybridized. Nws yog ib tug variation ntawm lub ntsej muag centered cubic. Lub pob zeb diamond lattice yog tsim los ntawm peb seem dispersed thiab txuas carbon atoms. Yog li piv rau graphite uas muaj cov pa roj carbon atoms teem rau hauv cov ntawv, cov ntawv cog lus tshuaj ntawm pob zeb diamond tsis muaj zog. Pob zeb diamond yog pob tshab siv lead ua. Nws feem ntau yog daj, xim av, grey lossis xim tsis muaj xim, tab sis vim yog impurities qee zaum nws tuaj yeem muaj xim xws li liab, violet, txiv kab ntxwv thiab lwm yam.
Pob zeb diamond siv lead ua muaj txiaj ntsig zoo, uas ua rau nws muaj txiaj ntsig ntau dua thiab. Nws yog cov khoom siv nyuaj tshaj plaws paub. Hauv Mohs scale ntawm hardness, nws yog ranked li muaj ib tug nqi ntawm 10, uas yog tus nqi siab tshaj. Hardness ntawm pob zeb nyob ntawm nws purity, crystalline perfection thiab orientation. Vim nws hardness nws yog siv los txiav iav, thiab kuj yog ib tug gemstone los ua jewelries. Pob zeb diamond muaj cov thermal conductivity uas nyob nruab nrab ntawm 900–2, 320 W·m−1·K−1 Pob zeb diamond tseem tuaj yeem ua cov khoom siv hluav taws xob.. Pob zeb diamond muaj cov yam ntxwv tshwj xeeb kho qhov muag uas rov ua rau nws haum raws li lub pov haum.
Vim cov pob zeb diamond yog lipophilic, lawv tuaj yeem muab rho tawm siv roj. Tsis tas li ntawd, nws yog hydrophobic. Pob zeb diamond tsis muaj zog heev. Pob zeb diamond yog ib txwm tsim nyob rau hauv lub ntiaj teb mantle ntawm kev kub siab thiab kub. Cov txheej txheem no siv sijhawm ntau txhiab xyoo. Txawm li cas los xij, tam sim no muaj cov txheej txheem hluavtaws los tsim cov pob zeb diamond los ntawm kev ua raws li cov xwm txheej ntuj.
Dab tsi yog qhov txawv ntawm Crystal thiab Pob Zeb Diamond?
• Pob zeb diamond yog siv lead ua.
• Pob zeb diamond yog cov siv lead ua nyuaj tshaj piv rau lwm cov siv lead ua.
• Pob zeb diamond muaj qhov tshwj xeeb kho qhov muag zoo sib xws rau lwm cov muaju.
• Thermal conductivity yog siab dua rau cov pob zeb diamond dua li ntau lwm cov muaju.
• Pob zeb diamond yog kim piv rau ntau yam khoom siv lead ua.
