Nws yog siv kom pom qhov yooj yim ntawm cov qauv crystalline cov khib nyiab npaj lawv tus kheej hauv. Qhov chaw lattice yog ib qho ntawm cov ntsiab lus uas qhia tias cov khoom (atoms, ions lossis molecules) tau teeb tsa li cas ntawm qhov chaw sib txawv hauv peb qhov chaw. Chav tsev yog qhov yooj yim tshaj plaws kom pom hauv ob qhov loj me.
Puas yog qhov chaw nyob?
Qhov peb-dimensional network ntawm kev xav txog kab txuas atoms yog hu ua qhov chaw lattice. Ib tug siv lead ua yog ib qho kev npaj nyob rau hauv peb qhov ntev ntawm atoms los yog molecules nyob rau hauv cov qauv rov ua dua. Qhov tsawg tshaj plaws chav tsev uas muaj tag nrho symmetry ntawm cov siv lead ua yog hu ua chav tsev cell, cov npoo ntawm uas tsim peb axes: a, b, thiab c.
qhov chaw lattice yog dab tsi thiab nws qhov tseem ceeb?
Hauv cov khoom siv crystalline, cov atoms lossis molecules tau teem caij tsis tu ncua thiab ntu ntu hauv peb qhov ntev. Ib qhov chaw lattice sawv cev rau cov qauv geometrical ntawm cov siv lead ua uas nyob ib puag ncig ntawm txhua qhov lattice taw tes yog tib yam. …
Dab tsi yog qhov sib txawv ntawm cov lattice thiab qhov chaw lattice?
A 3D translationally periodic arrangement of atoms in a space is called a crystal. Ib qho 3D translationally periodic kev npaj ntawm cov ntsiab lus nyob rau hauv ib qho chaw yog hu ua ib tug siv lead ua. kev npaj ntawm cov ntsiab lus hauv qhov chaw yog hu ua lattice. Qhov kev sib raug zoo ntawm ob yog dab tsi?
Tus yam ntxwv tseem ceeb ntawm qhov chaw lattice yog dab tsi?
Txhua taw tes hauv qhov chaw lattice sawv cev rau ib qho atom lossis ib pab pawgatoms. Txhua lub ntsiab lus hauv qhov chaw lattice muaj ib puag ncig zoo ib yam thoob plaws. Ib pawg peb seem ntawm cov ntsiab lus lattice uas thaum rov qab rau hauv qhov chaw tsim cov siv lead ua hu ua unit cell.
