The Synthesis of Crystalline Rare Earth Carbonates

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概要

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• The factors which influence the crystallization of rare earth carbonates were studied. Crystalline rare earth carbonates were precipitated at various temperatures from aqueous solutions by using sodium carbonate, sodium bicarbonate, trichloroacetic acid, and urea as precipitants. The crystal parameters, compositions, and factors concerning the formations of various carbonates, such as lanthanite-type Ln<SUB>2</SUB>(CO<SUB>3</SUB>)<SUB>3</SUB>·8H<SUB>2</SUB>O(Ln=La, Ce), tengeritetype Ln<SUB>2</SUB>(CO<SUB>3</SUB>)<SUB>3</SUB>·<I>n</I>H<SUB>2</SUB>O(Ln=Nd, Sm, Gd, Dy, Ho, Er, and Y, <I>n</I>=2–3), monoxocarbonate-type Ln<SUB>2</SUB>O(CO<SUB>3</SUB>)<SUB>2</SUB>·<I>n</I>H<SUB>2</SUB>O(Ln=La, Ce, Nd, and Sm, <I>n</I>=1–2) and a hydrated double carbonate of rare earth and sodium (rare earth= La, Ce, Nd, Sm, Gd, Dy, and Y) were determined by chemical analysis and X-ray powder diffractometry.

• 公益社団法人 日本化学会の論文

著者

• Wakita Hisanobu

  Department Of Chemistry Faculty Of Science Fukuoka University

• Nagashima Kozo

  Department Of Chemistry The University Of Tsukuba

• Mochizuki Akihiko

  Department Of Biotechnology And Life Science Faculty Of Technology Tokyo University Of Agriculture A

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