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Tellurium: Bismuth Telluride Calcined with Soda and Oil, Air Blown through the Leach (Thorpe 1913)
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Charlie

1. Novemba 2026DE
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Tellurium: Bismuth Telluride Calcined with Soda and Oil, Air Blown through the Leach (Thorpe 1913)

Roasting bismuth telluride with soda and oil in a closed pot turns the tellurium into sodium telluride, which dissolves in water. Air drawn through the solution throws the tellurium out again as a grey powder. Result: grey tellurium powder. Source: Thorpe, Dictionary of Applied Chemistry vol. 5 (1913), p. 433. Not given: amounts, temperature and which oil. Picture drawn by Youblob.
Kati
1 day

Maagizo

1

Powder the ore and make a paste

Grind tetradymite (bismuth telluride) finely, mix it with sodium carbonate and rub it up with oil into a thick paste. Ours: linseed oil.

Vifaa kwa hatua hii:

TetradimitiTetradimiti1 as required

Zana zinazohitajika:

Kabonati ya Sodiamu (Majivu ya Soda)Kabonati ya Sodiamu (Majivu ya Soda)
Mafuta ya KitaniMafuta ya Kitani
Kinu na mchi wa jiweKinu na mchi wa jiwe
2

Calcine in a closed crucible

Calcine the paste in a closed crucible. Ours: a porcelain crucible with lid in a muffle furnace.

Zana zinazohitajika:

Kikaango cha kuyeyushia chenye mfuniko (kaure)Kikaango cha kuyeyushia chenye mfuniko (kaure)
Tanuri ya muffleTanuri ya muffle
Koleo la kaure ya kuyeyushiaKoleo la kaure ya kuyeyushia
3

Leach with cold water

Leach the calcined mass with cold water; the sodium telluride dissolves. Ours: filter off what does not dissolve.

Zana zinazohitajika:

MajiMaji
Bikari ya kiooBikari ya kioo
Karatasi ya KuchujaKaratasi ya Kuchuja
4

Draw air through

Draw a current of air through the solution. Tellurium separates as a grey powder. Ours: an aspirator, then filter it off.

Zana zinazohitajika:

Hewa ya angahewa - DuniaHewa ya angahewa - Dunia
AsipiretaAsipireta
Karatasi ya KuchujaKaratasi ya Kuchuja

Vifaa

1
  • 1
    Tetradimiti
    1 as required
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