Hexagonal-bipyramid crystalline scandium oxide powder and a proc

Details Hexagonal-bipyramid crystalline scandium oxide powder and a proc Hexagonal-bipyramid crystalline scandium oxide powder and a proc

1988-05-25

1990-12-25

Doll, John

Chemistry of inorganic compounds

Rare earth compound

423 211, C01F 1700

Patent

active

049801414

ABSTRACT:
Hexagonal-bipyramid crystalline scandium oxide powder and a process for preparing the same are disclosed. The process comprises forming scandium oxalate from an acid aqueous solution containing scandium in the presence of chloride ions and ammonium ions, collecting the precipitate and heating the collected precipitate. Hexagonal-bipyramid crystalline scandium oxide is useful for making electron gun for cathode ray tubes.

REFERENCES:
Bailor, Jr. et al., Comprehensive Inorganic Chemistry, 1972, p. 345.
Horovitz et al., Scandium Its Occurance, Chemistry, Physics, Metallurgy, Biology and Technology, 1975, p. 156.
"Crystal structure of particles in internally oxidized nickel alloys" by Alenkin et al., Fiz. Met. Metalloved, 41(2)375-81, 1976.

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