Qhov Tseem Ceeb - HCP vs CCP
Lo lus "kaw ntim cov qauv" yog siv hais txog cov lattices lossis crystal systems. Nws piav txog cov tshuab siv lead ua uas muaj cov atoms nruj nreem kaw. Hauv cov tshuab siv lead ua, lub atom hu ua "sphere". Qhov ntawd yog vim hais tias ib qho atom raug suav hais tias yog cov qauv kheej kheej rau qhov yooj yim ntawm kev piav qhia txog lub cev siv lead ua. Kaw cov khoom sib npaug ntawm cov spheres yuav tsim cov siv lead ua ntom ntom nrog qhov tsawg kawg nkaus qhov khoob lossis qhov ntawm cov spheres. Muaj ntau hom qhov uas tuaj yeem muaj nyob hauv nruab nrab ntawm spheres. Lub qhov muaj nyob nruab nrab ntawm peb qhov sib npaug spheres yog hu ua trigonal qhov vim nws zoo li daim duab peb sab. Muaj ob peb txheej ntawm spheres tam sim no nyob rau sab saum toj ntawm ib txheej. Yog hais tias lub thib ob txheej yog muab tso rau hauv xws li ib tug txoj kev uas ib tug daim duab peb sab qhov yog them los ntawm lub thib ob txheej spheres, nws tsim ib tug tetrahedral qhov. Tab sis yog hais tias lub thib ob txheej yog muab tso rau uncovering lub trigonal qhov, ces nws tsim ib tug octahedral qhov. Muaj ob peb hom kaw ntim khoom siv lead ua xws li HCP (Hexagonal closest packed) thiab CCP (Cubic closest packed). Qhov sib txawv tseem ceeb ntawm HCP thiab CCP yog tias cov qauv rov ua dua ntawm HCP muaj 2 txheej ntawm spheres whereas cov qauv rov ua dua ntawm CCP muaj 3 txheej ntawm spheres.
HCP yog dab tsi?
Lub sij hawm HCP sawv cev rau hexagonal ze tshaj plaws ntim siv lead ua tshuab. Nyob rau hauv hexagonal ze tshaj packed siv lead ua tshuab, lub thib peb txheej ntawm spheres muaj tib yam kev npaj ntawm spheres li nyob rau hauv thawj txheej. Tom qab ntawd cov spheres ntawm txheej thib ob npog lub qhov tetrahedral ntawm thawj txheej thiab txheej thib peb.
Daim duab 01: HCP Qauv
Lub hexagonal ze tshaj plaws ntim cov khoom siv lead ua muaj nyob ib ncig ntawm 74% ntawm nws qhov ntim nyob ntawm spheres lossis atoms whereas 26% ntawm qhov ntim yog nyob ntawm qhov chaw khoob. Ib qho atom lossis ib puag ncig hauv HCP qauv yog nyob ib puag ncig los ntawm 12 tus neeg nyob sib ze. HCP crystal system muaj 6 tus tswv cuab (atoms lossis spheres) ib chav cell.
CCP yog dab tsi?
Lub sij hawm CCP sawv cev rau lub cubic ze tshaj plaws ntim siv lead ua tshuab. Ntawm no ob txheej ntawm spheres yog muab tso rau ntawm ib nrab ntawm kev nyuaj siab ntawm thawj txheej. Qhov thib peb txheej yog txawv kiag li ntawm thawj ob txheej. Qhov thib peb txheej yog stacked nyob rau hauv lub depressions ntawm ob txheej. Yog li ntawd, qhov ntim no npog tag nrho cov qhov octahedral txij li cov txheej txheem tsis tau ntim rau hauv kab nrog ib leeg. Txawm li cas los xij, txheej plaub zoo ib yam li thawj txheej thiab yog li, cov qauv rov ua dua.
Daim duab 02: A CCP Qauv
Lub cubic ze tshaj plaws ntim cov khoom siv lead ua muaj nyob ib ncig ntawm 74% ntawm nws qhov ntim nyob ntawm spheres lossis atoms whereas 26% ntawm qhov ntim yog nyob ntawm qhov chaw khoob. Ib qho atom lossis ib puag ncig hauv CCP qauv yog nyob ib puag ncig los ntawm 12 tus neeg nyob sib ze ib yam li hauv HCP. Lub CCP siv lead ua system muaj 4 tus tswv cuab (atoms lossis spheres) ib chav cell.
Qhov Zoo sib xws ntawm HCP thiab CCP yog dab tsi?
- Ob HCP thiab CCP muaj spheres nrog 12 tus neeg nyob sib ze.
- Ob lub HCP thiab CCP siv lead ua tshuab muaj nyob ib ncig ntawm 74% ntawm nws qhov ntim nyob ntawm qhov chaw lossis atoms whereas 26% ntawm qhov ntim yog nyob ntawm qhov chaw khoob.
Qhov txawv ntawm HCP thiab CCP yog dab tsi?
HCP vs CCP |
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| Lub sij hawm HCP stands rau hexagonal ze packed siv lead ua tshuab. | Lub sij hawm CCP stands rau cubic closest packed crystal systems. |
| Unit Cell | |
| Ib lub cell ntawm HCP muaj 6 tus tswv cuab. | Ib tug subordinate clause pib nrog subordinate conjunction los yog ib tug txheeb ze pronoun. |
| qauv | |
| Nyob hauv HCP siv lead ua tshuab, txheej thib peb ntawm spheres muaj tib qhov kev npaj ntawm spheres ib yam li hauv thawj txheej, yog li spheres ntawm txheej thib ob npog cov tetrahedral qhov ntawm thawj txheej thiab txheej thib peb. | Hauv CCP siv lead ua tshuab, txheej txheej thib ob ntawm spheres tau muab tso rau ntawm ib nrab ntawm kev nyuaj siab ntawm thawj txheej thiab txheej thib peb yog txawv kiag li ntawm thawj ob txheej; txheej thib peb yog stacked nyob rau hauv kev nyuaj siab ntawm lub thib ob txheej. |
| Rov ua qauv | |
| Cov qauv rov ua dua ntawm HCP muaj 2 txheej ntawm spheres. | Cov qauv rov ua dua ntawm CCP muaj 3 txheej ntawm spheres. |
Summary – HCP vs CCP
HCP thiab CCP yog ob hom qauv siv lead ua. Qhov sib txawv ntawm HCP thiab CCP yog tias, Hauv HCP siv lead ua tshuab, cov txheej txheem thib peb ntawm spheres muaj tib qhov kev npaj ntawm spheres li hauv thawj txheej; Yog li ntawd, spheres ntawm txheej thib ob npog lub tetrahedral qhov ntawm thawj txheej thiab txheej thib peb whereas nyob rau hauv CCP siv lead ua tshuab, txheej thib ob ntawm spheres yog muab tso rau ib nrab ntawm kev nyuaj siab ntawm thawj txheej, thiab txheej thib peb yog txawv kiag li. uas yog thawj ob txheej; txheej thib peb yog stacked nyob rau hauv kev nyuaj siab ntawm lub thib ob txheej.
