Qhov sib txawv tseem ceeb ntawm cov txheej txheem hexagonal chav cell thiab hexagonal kaw packing yog tias hexagonal unit cell yog qhov rov ua dua ntawm hexagonal siv lead ua qhov system whereas hexagonal kaw ntim yog cov qauv ntawm cov siv lead ua lattice uas muaj hexagonal unit cell.
Lub tsev neeg hexagonal siv lead ua hauv crystallography yog ib qho ntawm rau tsev neeg siv lead ua, uas suav nrog ob lub tshuab siv lead ua (hexagonal thiab trigonal) thiab ob lub lattice systems (hexagonal thiab rhombohedral). Muaj 12 pawg ntsiab lus hauv hexagonal siv lead ua tsev neeg qhov tsawg kawg yog ib qho ntawm lawv qhov chaw pawg muaj hexagonal lattice raws li lub hauv paus lattice thiab yog lub koom haum ntawm lub hexagonal siv lead ua thiab lub trigonal crystal system.
Pimitive Hexagonal Unit Cell yog dab tsi?
Primitive hexagonal unit cell yog ib lo lus uas yog siv los sau lub npe rov ua dua ntawm lub hexagonal siv lead ua lattice. Chav tsev cell no yog abbreviated li hcp unit cell. Nws muaj qhov siab atomic ntom vim tias muaj lub ntsej muag hexagon nyob rau hauv qhov chaw hla ntawm lub crystal lattice.
Daim duab 01: Cov qauv ntawm Primitive Hexagonal Unit Cell
Cov xovtooj tseem ceeb ntawm hexagonal siv lead ua lattice tuaj yeem piav qhia raws li txoj cai rhombic prism chav tsev ntawm tes nrog ob txoj hlua sib npaug (lub npe hu ua a thiab b), suav nrog lub kaum sab xis ntawm 120 ° (lub npe hu ua γ) thiab qhov siab (npe. raws li c, uas yuav txawv ntawm a) perpendicular rau ob lub hauv paus axes.
Hexagonal Kaw Packing yog dab tsi?
Hexagonal kaw packing yog ib lo lus uas siv rau lub npe siv lead ua lattice nrog hexagonal unit cells. Hexagonal close packing (HCP) yog ib qho kev npaj ntawm spheres nyob rau hauv ib lub lattice; muaj ob txheej ntawm spheres muab tso rau ntawm ib sab, tsim tetrahedral thiab octahedral qhov. Qhov ntawd txhais tau tias; ob txheej ntawm spheres yog muab tso rau hauv xws li ib txoj kev uas lub trigonal qhov ntawm thawj txheej yog them los ntawm lub spheres ntawm ob txheej. Qhov thib peb txheej ntawm spheres zoo li thawj txheej, thiab txheej plaub zoo li txheej thib ob, yog li, cov qauv rov ua dua. Yog li ntawd, chav tsev rov ua dua ntawm hexagonal kaw packing kev npaj yog tsim los ntawm ob txheej ntawm spheres.
Daim duab 02: Ib qho piv txwv ntawm Hexagonal Close Packing Structure yog Quartz
Vim tib lub qauv rov ua dua tom qab txhua ob txheej ntawm spheres, spheres tau ua tiav 74% ntawm qhov ntim ntawm cov lattice. Qhov chaw khoob yog nyob ib ncig ntawm 26%. Txhua tus kheej nyob rau hauv qhov kev npaj no yog surrounded los ntawm 12 nyob sib ze spheres. Thaum cov chaw nruab nrab ntawm 13 spheres (ib thooj + 12 tus neeg nyob sib ze) raug txiav txim siab, nws muab rau lub pyramid rau sab nrog lub hauv paus hexagonal. Qhov no ua rau lub npe no cov qauv ua ib hexagonal kaw packing kev npaj. Lub hexagonal kaw packing npaj muaj ib lub qhov loj octahedral ib tug kheej kheej uas yog surrounded los ntawm rau spheres; rau txhua tus kheej kheej, muaj ob lub tetrahedral qhov nyob ib puag ncig los ntawm plaub lub spheres.
Dab tsi yog qhov txawv ntawm Primitive Hexagonal Unit Cell thiab Hexagonal Kaw Packing?
Qhov sib txawv tseem ceeb ntawm cov txheej txheem hexagonal chav cell thiab hexagonal kaw packing yog tias lub sij hawm hexagonal unit cell piav qhia txog chav tsev rov ua dua ntawm hexagonal siv lead ua qhov system thaum lub sij hawm hexagonal kaw ntim yog hais txog cov qauv ntawm cov siv lead ua lattice uas muaj hexagonal. chav cell.
Summary – Primitive Hexagonal Unit Cell vs Hexagonal Kaw Packing
Hexagonal siv lead ua tsev neeg hauv crystallography yog ib qho ntawm rau lub tsev neeg siv lead ua, uas suav nrog ob lub tshuab siv lead ua (hexagonal thiab trigonal) thiab ob lub lattice systems (hexagonal thiab rhombohedral). Qhov sib txawv tseem ceeb ntawm qhov qub hexagonal unit cell thiab hexagonal kaw packing yog tias lub sij hawm hexagonal unit cell piav qhia txog qhov rov ua dua ntawm lub hexagonal siv lead ua qhov system thaum lub sij hawm hexagonal kaw ntim yog hais txog cov qauv ntawm cov siv lead ua lattice uas muaj hexagonal unit cell.
