• Ionic radii/pm Lantanoidlarda Ln3+ ion radiusi o’zgarishi 57 59 61 63 65 67 69 71 Atomic number-*•
  • China India CISa Malaysia *Data for CIS (Commonwealth of Independent States) is an estimate. Раствор (Y, Ln)2(S04)3 иттриевой подгруппы
  • 4. SEPARATION Separating and purifying the individual REE oxides Lantanoidlarning olinishi 2
  • Lantanoid va Aktinoidlar




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    Lantanoid va Aktinoidlar

    Lantanoid va Aktinoidlar
    ► Lantanoidlar - 4f elementlar: Ce - Lu
    ► Aktinoidlar - 5f elementlar: Th - Lr
    ► Lantanid = “Lantandan keyin yoki anion shakli”

    ► Aktinid = “Aktiniydan keyin yoki anion shakli”

    ► IUPAC bo’yicha Lantanoid & Aktinoid = “o’xshash”

    Ac va aktinoidlar radioaktiv


    2
    4


    Ionic radii/pm

    Lantanoidlarda Ln3+ ion radiusi o’zgarishi

    57 59 61 63 65 67 69 71

    Atomic number-*•
    ► La-Lu ga atom va ion radiusi kichrayadi -“lantanoid siqilish”

    ► La3+-Lu3+ ga ion radiusi 18% kichrayadi


    ► Zr va Hf ning atom radiusi juda yaqinligi -ajratib olish qiyin
    5
    ► Pm dan boshqasi sezilarli uchraydi (Y, La va 14 ta 4f elementlar - “Siyrak Yer Elementlarf’)

    ► (Y, La, Ln, Th)PO4 - monatsit (Y, La, Ln)(C03)F -


    bastnezit da asosiy element Ce (»50%)
    La (*20-30%)
    China India CISa Malaysia

    *Data for CIS (Commonwealth of Independent States) is an estimate.

    Раствор (Y, Ln)2(S04)3 иттриевой подгруппы
    7

    1. MINING
    From the ground to crushed ore
    2. MILLING
    Grinding and beneficiation of REE minerals

    3. HYDROMETALLURGY
    Cracking the REE minerals to produce mixed REE oxides concentrates


    4. SEPARATION
    Separating and purifying the individual REE oxides


    Lantanoidlarning olinishi 2
    ► Alohida olingan metal komplekslariga oksalatli ishlov beriladi va u termik parchalanadi:
    Ln2(C2O4)3 = Ln2O3 + 3CO + 3CO2
    ► Oksidlar ftoridga o’tkaziladi:
    Ln2O3 + 6HF = 2LnF3 + 3H2O
    Oddiy moddalar metallotermiya usulida qaytarib olinadi:
    2LnF3 + 3Ca = 3CaF2 + 2Ln
    9
    ► Qiyin suyuqlanuvhan metallar - 795-1660°C

    ► Barchasi kumushsimon oq; Pr va Nd sarg’ish


    ► Polimorfizm xos;
    ► Kristall panjarasi geksagonal tuzilishli;
    ► Ba’zi lantanoidlar yuqori temperaturada ham ferromagnit
    ► Elektr o’tkazuvchanligi past (Cu dan 25-50 marta)
    10

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