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Ytterbium: Oxide Reduced by Lanthanum at 1020 °C in Vacuum, Metal Distilled Off (Shindo and Yagi, US 2010/0260640)
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Charlie

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Ytterbium: Oxide Reduced by Lanthanum at 1020 °C in Vacuum, Metal Distilled Off (Shindo and Yagi, US 2010/0260640)

Ytterbium boils far more easily than lanthanum. Heated with lanthanum in a vacuum, ytterbium oxide gives up its oxygen to the lanthanum, and the freed ytterbium leaves as vapour and condenses in a cooler zone, while lanthanum oxide stays behind. Result: ytterbium metal ingots; 20 kg of distillate in the patent's run, low in sodium, potassium and lithium. Source: Y. Shindo and K. Yagi, US patent application 2010/0260640 (2010), Example 1. Not given: how much lanthanum, the vacuum, the time, crucible and condenser materials. Picture drawn by Youblob.
Hejuru
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Amabwiriza

1

Mix the oxide with lanthanum

Mix ytterbium oxide with lanthanum metal as the reducing agent. Not given: the proportions.

Ibikoresho by'iyi ntambwe:

Okiside ya iteribiyumuOkiside ya iteribiyumu1 as required

Ibikoresho bikenewe:

LantaniLantani
Inkono ya tantalumInkono ya tantalum
2

Reduce in vacuum at 1020 °C

Heat the charge in a vacuum to 1020 °C: Yb2O3 + 2 La -> 2 Yb (vapour) + La2O3. Ours: a vacuum induction furnace; the vacuum level and time are not given.

Ibikoresho bikenewe:

Itanura rya inductionItanura rya induction
Pompe ikuramo umwukaPompe ikuramo umwuka
Inkono ya tantalumInkono ya tantalum
3

Condense the ytterbium at 200-600 °C

Catch the ytterbium vapour on a condenser held at 200-600 °C. Most of it settles in the 300-500 °C part; the 200-300 °C part carries the least sodium and lithium. Ours: a tantalum condenser plate.

Ibikoresho bikenewe:

Isahani yo gukonjesha ya tantalumuIsahani yo gukonjesha ya tantalumu
4

Melt into ingots under argon

Take the distillate off the condenser, melt it in a crucible at 950 °C under a slight pressure of argon, and let it solidify into an ingot.

Ibikoresho bikenewe:

Inkono ya tantalumInkono ya tantalum
Itanura rya inductionItanura rya induction
ArigoniArigoni

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Erbium, Ytterbium, Thulium and Lutetium Oxides: Xenotime Separated on Ion Exchange Columns with EDTA and HEDTA (Spedding and Powell, US 2,956,858)
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Erbium, Ytterbium, Thulium and Lutetium Oxides: Xenotime Separated on Ion Exchange Columns with EDTA and HEDTA (Spedding and Powell, US 2,956,858)

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Lanthanum: Anhydrous Chloride Reduced with Calcium in a Tantalum Bomb under Argon, then Vacuum Cast (Daane, Ames 1950)
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Lanthanum: Anhydrous Chloride Reduced with Calcium in a Tantalum Bomb under Argon, then Vacuum Cast (Daane, Ames 1950)

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