Thiab ntiaj teb rare hais muaj ntsis zoo ib yam tshuaj lom neeg zog anomalous tiag tiag li, muaj ntau lem yuav siv li ion los luj dais keev xeeb ligand kam yuav electrons, nrog rau lub ntuj lub teb rare ions hlau tau ib tug loj ionic radii, thawj los electrostatic attraction rau ligands inorganic lossis organic roos ion ua kom sib haum nyiaj, raws li ib puag atomic complex, feem ntau d2SP3, d4dP3, f3d5Ssp3 lwm txoj kev sablaj thiab hybrid txoj uas muaj pestsawg ntawm 6-12.
Ntsiab Rare ntiaj teb zoo txhua yam zog thiab grouping txhooj yog txhawj xeeb nrog cov duab khoom uas hais rare ntiaj teb. Vim lub voos kheej-kheej ntawm atoms thiab ions yeej tseem ceeb tshaj rooj siv lead ua qauv hom, hardness, ceev thiab melting taw tes thiab lwm yam khoom lub cev, rau qhov kub thiab tej yam kev mob siab, lub ntiaj teb rare lanthanum, praseodymium, neodymium, qauv siv lead ua ob-hexagonal, thiab cerium sau lo lus teb siv lead ua huab (lub ntsej muag kheej) configuration, thaum tus kub thiab siab pauv, saibxyuas rare ntiaj teb nruab polymorph hloov. Vim hais tias kom lanthanides, lanthanide atomic vojvoog, atomic ntim decreases nrog atomic coob ntxiv, ntxiv thiab ntxiv ceev nrog atomic number, tab sis cov cerium thiab cov lanthanum, praseodymium, neodymium sib piv, muaj cov anomalies.