CARBOTHERMIC REDUCTION OF PROTACTINIUM PENTOXIDE AND FIRST RESULTS ON PROTACTINIUM CARBIDE

被引：13

作者：

LORENZ, R

SCHERFF, HL

TOUSSAIN.N

机构：

[1] Institut für Kern-und Radiochemie, T.U. Braunschweig

[2] Chemistry Department, CCR Euratom, Ispra

来源：

JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY | 1969年 / 31卷 / 08期

基金：

欧盟地平线“2020”;

关键词：

D O I：

10.1016/0022-1902(69)80568-3

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The reduction of Pa2O5 with carbon has been investigated in the temperature range 1000-2200°C. As a first step at about 1100°C reduction of Pa2O5 to PaO2 occurs, followed by complete reduction to PaC at higher temperatures and reduced pressures. The CO-equilibrium pressures of the reaction: PaO2 + 3C = PaC + 2CO have been determined in the temperature range of 1290-1440°C. The temperature dependence is given by: log Pco = 12,07-19940/T (with Pco in torr). The PaC structure has been identified from X-ray powder patterns as being identical to those of the other actinide monocarbides (fcc structure, NaCl-type a0 = 5,0608 ± 0,0002 Å). At temperatures above 2000°C and with an excess of free carbon formation of a higher carbide, probably the dicarbide, PaC2 could be observed. © 1969.

引用

页码：2381 / &

共 16 条

[1] ACKERMANN RJ, 1966, 1965 P S THERM NUCL, V1, P243
[2] AISNLEY R, 1963, 1963 P C NEW NUCL MA, V1, P349
[3] ATOMIC RADII IN SEMI-METALLIC COMPOUNDS OF ROCKSALT STRUCTURE
ALLBUTT, M
DELL, RM
[J]. JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1968, 30 (03): : 705 - &
[4] BENESOVSKY F, 1961, PLANSEEBER PULVERMET, V9, P65
[5] BROWN D, 1965, Q REV, V17, P289
[6] GLASSNER A, 1957, ANL5750 USAEC REP
[7] HOLLEY CE, 1968, 1967 S THERM NUCL MA, P397
[8] Piazza J., 1962, J CHEM ENG DATA, V7, P451
[9] The high-temperature equilibrium between thorium oxide and carbon
Prescott, CH
Hincke, WB
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1927, 49 : 2744 - 2753
[10] SCHERFF HL, 1964, RADIOCHIM ACTA, V2, P141

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