Qhov sib txawv tseem ceeb ntawm FCC thiab HCP yog tias FCC qauv voj voog ntawm peb txheej thaum HCP qauv voj voog ntawm ob txheej.
FCC yog lub ntsej muag-centred cubic kaw-packed qauv thaum HCP yog ib tug hexagonal kaw-packed qauv. Peb tham txog cov qauv no nyob rau hauv daim teb ntawm siv lead ua lattices.
FCC yog dab tsi?
FCC yog lub ntsej muag-centred cubic kaw packing qauv ntawm lattices. Nws yog qhov chaw ua haujlwm zoo ntawm cov qauv siv lead ua. Tus naj npawb ntawm cov qauv no yog 12, thaum tus naj npawb ntawm atoms ntawm ib chav tsev cell yog 4. Ntawm no, tus naj npawb ntawm kev sib koom tes yog tus naj npawb ntawm cov atoms uas lub cell kov. Qhov tseem ceeb, cov qauv no ua tau zoo nyob 74% ntawm qhov chaw; yog li, qhov chaw khoob yog 26%.
Daim duab 01: FCC Structure
Hauv cov qauv no, chav tsev cell muaj atoms ntawm qhov chaw ntawm lub ntsej muag ntawm chav tsev cell, thiab yog li, nws ua rau naming nws lub ntsej muag-center. Ntxiv mus, nyob rau hauv lub cubic kaw packing qauv, FCC yog qhov yooj yim dua qauv. FCC txheej voj voog ntawm peb txheej. Nws muaj peb hom dav hlau uas txawv ntawm ib leeg. Qee qhov piv txwv rau cov hlau uas muaj cov qauv no suav nrog txhuas, tooj liab, kub, txhuas, nyiaj, platinum, thiab lwm yam.
HCP yog dab tsi?
HCP yog hexagonal kaw packing qauv ntawm lattices. Nws kuj yog qhov chaw ua haujlwm zoo ntawm cov qauv siv lead ua. Tus naj npawb ntawm cov qauv no yog 2, thaum tus naj npawb ntawm atoms ib chav cell yog 6. Tus qauv occupies 74% ntawm tag nrho cov chaw; yog li, qhov chaw khoob yog 26%. Ntawm no, HCP txheej voj voog ntawm ob txheej. Qhov ntawd txhais tau tias; txheej thib peb ntawm cov qauv zoo ib yam li thawj txheej.
Daim duab 02: HCP Crystal Structure
Peb tuaj yeem piav qhia qhov kev teeb tsa no ua "a-b-a-b-a-b". Qee cov hlau uas muaj hexagonal ze-packed siv lead ua qauv muaj xws li cob alt, cadmium, zinc, thiab α theem ntawm titanium.
Qhov txawv ntawm FCC thiab HCP yog dab tsi?
FCC yog lub ntsej muag-centred cubic kaw cov qauv ntawm lattices thaum HCP yog hexagonal kaw cov qauv ntawm lattices. Qhov sib txawv tseem ceeb ntawm FCC thiab HCP yog FCC cov qauv voj voog ntawm peb txheej thaum HCP qauv voj voog ntawm ob txheej.
Ntxiv mus, ib qho sib txawv ntawm FCC thiab HCP yog tias hauv FCC, txheej thib peb txawv ntawm thawj txheej thaum nyob hauv HCP, txheej thib peb zoo ib yam li thawj txheej. Aluminium, tooj liab, kub, lead, nyiaj, platinum, thiab lwm yam yog qee qhov piv txwv rau FCC thaum piv txwv rau HCP suav nrog cob alt, cadmium, zinc, thiab α theem ntawm titanium.
Summary – FCC vs HCP
Nyob rau hauv cov ntsiab lus, FCC yog lub ntsej muag-centred cubic kaw packing qauv ntawm lattices thiab HCP yog hexagonal kaw packing qauv ntawm lattices. Qhov sib txawv tseem ceeb ntawm FCC thiab HCP yog FCC qauv voj voog ntawm peb txheej thaum HCP qauv voj voog ntawm ob txheej.
Image Courtesy:
1. "FCC siv lead ua qauv" Los ntawm Tus Neeg Siv: ARTE - Tus kheej ua haujlwm (Public Domain) ntawm Commons Wikimedia
2. "HCP siv lead ua qauv" Los ntawm Tus Neeg Siv: ARTE - Tus kheej ua haujlwm (Public Domain) ntawm Commons Wikimedia
