Video: Dab tsi yog atomic packing factor ntawm cov qauv siv lead ua?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Atomic packing factor tseem hu ua ntim efficiency ntawm a siv lead ua . Nws txhais tau tias yog qhov ntim tau los ntawm kev sib txuas tag nrho atoms ntawm ib lub cell nyob rau hauv kev sib piv rau tag nrho cov ntim ntawm ib chav tsev cell i.e. nws yog a feem ntawm volume occupied los ntawm tag nrho cov atoms nyob rau hauv ib lub cell mus rau tag nrho cov ntim ntawm ib lub cell.
Kuj paub, dab tsi yog txhais los ntawm atomic packing factor?
Los ntawm Wikipedia, dawb encyclopedia. Hauv crystallography, atomic packing factor (APF), ntim efficiency los yog packing feem yog cov feem ntawm ntim nyob rau hauv ib tug siv lead ua qauv uas yog nyob los ntawm constituent hais. Nws yog ib qho dimensionless kom muaj nuj nqis thiab ib txwm tsawg dua kev sib sau.
Ib tug kuj yuav nug, qhov txawv ntawm fcc thiab bcc yog dab tsi? FCC stands rau lub ntsej muag-centred cubic arrangement. Cov kev npaj no yog siv los piav qhia qhov chaw ntawm atoms, molecules lossis ions thiab qhov chaw khoob tam sim no hauv a lattice qauv. Cov qhov sib txawv ntawm BCC thiab FCC yog tus naj npawb ntawm kev sib koom tes BCC yog 8 qhov kev sib koom tes ntawm FCC yog 12.
Ib yam li ntawd, atomic packing factor siv rau dab tsi?
Atomic Packing Factor (APF) txhais tau tias yog qhov ntim ntawm atoms nyob rau hauv lub unit cell muab faib los ntawm lub ntim ntawm lub unit cell. Peb hloov cov ntsiab lus lattice nyob rau hauv chav tsev cell nrog spheres thiab xam cov fractional ntim nyob los ntawm cov spheres nyob rau hauv lub cell.
Puas yog hcp thiab bcc tib yam?
Lub hexagonal ze tshaj packed ( hcp ua ) muaj tus lej sib koom ua ke ntawm 12 thiab muaj 6 atoms hauv ib chav cell. Lub ntsej muag-centered cubic (fcc) muaj kev sib koom tes ntawm 12 thiab muaj 4 atoms rau ib chav cell. Lub cev-centered cubic ( bcc ua ) muaj tus lej sib koom ua ke ntawm 8 thiab muaj 2 atoms rau ib chav cell.
Pom zoo:
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Copper(II) sulfate Names Structure Crystal structure Orthorhombic (anhydrous, chalcocyanite), space group Pnma, oP24, a = 0.839 nm, b = 0.669 nm, c = 0.483 nm. Triclinic (pentahydrate), qhov chaw pab pawg P1, aP22, a = 0.5986 nm, b = 0.6141 nm, c = 1.0736 nm, α = 77.333 °, β = 82.267 °, γ = 72.567 ° Thermochemist
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