Cov khoom
| Lanthanum, 57 La | |
| Atomic naj npawb (Z) | 57 |
| Phase ntawm STP | khov kho |
| Melting point | 1193 K (920 ° C, 1688 ° F) |
| Boiling point | 3737 K (3464 ° C, 6267 ° F) |
| Ceev (ze rt) | 6.162 g / cm3 |
| thaum ua kua (ntawm mp) | 5,94g 3 |
| Kub ntawm fusion | 6.20 kJ / mol |
| Kub ntawm vaporization | 400 kJ / mol |
| Molar tshav kub muaj peev xwm | 27.11 J/(mol·K) |
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Lanthanum (La) Oxide
Lanthanum Oxide, tseem hu ua ib tug heev insoluble thermally ruaj khov Lanthanum qhov chaw, yog ib tug inorganic compound uas muaj lub ntiaj teb tsis tshua muaj caij lanthanum thiab oxygen.Nws yog tsim rau iav, optic thiab ceramic daim ntaub ntawv, thiab siv nyob rau hauv ib co ferroelectric cov ntaub ntawv, thiab yog ib tug feedstock rau tej catalysts, ntawm lwm yam kev siv.
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Lanthanum Carbonate
Lanthanum Carbonateyog ntsev tsim los ntawm lanthanum (III) cations thiab carbonate anions nrog cov tshuaj formula La2(CO3)3.Lanthanum carbonate yog siv los ua cov khoom pib hauv lanthanum chemistry, tshwj xeeb tshaj yog hauv kev sib xyaw oxides.
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Lanthanum (III) Chloride
Lanthanum (III) Chloride Heptahydrate yog ib qho zoo heev dej soluble crystalline Lanthanum qhov chaw, uas yog ib qho inorganic compound nrog mis LaCl3.Nws yog ib qho ntsev ntau ntawm lanthanum uas yog siv rau hauv kev tshawb fawb thiab sib xws nrog chlorides.Nws yog cov khoom dawb uas yog soluble hauv dej thiab cawv heev.
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Lanthanum Hydroxide
Lanthanum Hydroxideyog ib qho dej uas tsis muaj kuab lom heev crystalline Lanthanum qhov chaw, uas tuaj yeem tau txais los ntawm kev ntxiv alkali xws li ammonia rau aqueous daws ntawm lanthanum ntsev xws li lanthanum nitrate.Qhov no ua rau gel zoo li precipitate uas tuaj yeem qhuav hauv huab cua.Lanthanum hydroxide tsis hnov mob ntau nrog cov tshuaj alkaline, tab sis yog me ntsis soluble hauv acidic kua.Nws yog siv compatibly nrog siab dua (pib) pH ib puag ncig.
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Lanthanum Hexaboride
Lanthanum Hexaboride (LaB 6,kuj hu ua lanthanum boride thiab LaB) yog ib qho tshuaj inorganic, boride ntawm lanthanum.Raws li cov khoom siv refractory ceramic uas muaj qhov melting point ntawm 2210 ° C, Lanthanum Boride yog insoluble hauv dej thiab hydrochloric acid, thiab hloov mus rau oxide thaum rhuab (calcined).Cov qauv Stoichiometric yog xim liab-violet, thaum cov boron nplua nuj (saum LaB6.07) yog xiav.Lanthanum Hexaboride(LaB6) paub txog nws qhov hardness, mechanical zog, thermionic emission, thiab muaj zog plasmonic zog.Tsis ntev los no, cov txheej txheem tshiab nruab nrab-kub hluavtaws tau tsim los ncaj qha rau kev sib txuas ntawm LaB6 nanoparticles.
