THE BORIDES OF PRASEODYMIUM ERBIUM, AND TERBIUM

Journal Article · Fri Apr 01 04:00:00 EST 1960 · Soviet Phys.-Cryst.

OSTI ID:4160615

Samsonov, G V; Paderno, Yu B; Serebryakova, T I

The borides of erbium, praseodymium, and terbium were prepared by reducing the oxides with boron and boron carbide in vacuo at 1500 to 2000 deg C. The B/sub 4/C method produced PrB/sub 6/ oniy and gave the result a= 4.12 A. The boron method gave a tetragonal ErB/sub 4/(UB/sub 4/ structure) with a = 7.08 A and c = 4.02 A for firing at 1600 to 2000 deg F. An intense blue color was deposited at 1800 deg C in the cooler parts of the furnace; the color is typical of rare-earth hexaborides. Both methods were used to make TbB/sub 6/ at 1650 deg C. Results show a = 4.11 A, in agreement with those for other rareearth hexaborides. The B/sub 4/C method gave a grey-brown product of TbB/sub 4/ with a = 7.15 and c = 4.07 A. (B.O.G.)

• Research Organization: Academy of Sciences, Ukrainian SSR
• NSA Number: NSA-14-014106
• OSTI ID: 4160615
• Journal Information: Soviet Phys.-Cryst., Journal Name: Soviet Phys.-Cryst. Vol. Vol: 4
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BORON
BORON CARBIDES
COLOR
COOLING
ERBIUM BORIDES
FURNACES
HIGH TEMPERATURE
LATTICES
METALS, CERAMICS, AND OTHER MATERIALS
OXIDES
PRASEODYMIUM BORIDES
PREPARATION
RARE EARTHS
REDUCTION
STANDARDS
TERBIUM BORIDES
URANIUM BORIDES
VACUUM