A new determination of the enthalpy of solution of berkelium metal and the standard enthalpy of formation of Bk3+ (aq)
作者:J. Fuger、R.G. Haire、J.R. Peterson
DOI:10.1016/0022-1902(81)80090-5
日期:1981.1
The enthalpy of solution of berkeliummetal (dhcp) in 1 M HCl has been measured at 298.15 ± 0.05 K, giving a value of −600.2 ± 5.1 kJ mol−1. From this value, the standardenthalpy of formation of Bk3+ (aq) is derived as −601 ± 5 kJ mol−1 and, using reasonable entropy estimates, the standard potential of the Bk3+/Bk° couple is calculated to be −2.01 ± 0.03 V.
经测定,铍金属(dhcp)在1 M HCl中的溶液焓为298.15±0.05 K,值为-600.2±5.1 kJ mol -1。根据该值,Bk 3+(aq)的形成标准焓为-601±5 kJ mol -1,并使用合理的熵估计,计算出Bk 3+ / Bk°偶的标准电势为−2.01±0.03 V.
The crystal structures and lattice parameters of berkelium metal
作者:J.R. Peterson、J.A. Fahey、R.D. Baybarz
DOI:10.1016/0022-1902(71)80656-5
日期:1971.10
first bulk samples of berkeliummetal have been prepared by the reduction at ∼1000°C of BkF3 with lithium metal in a tantalum crucible system. Berkeliummetal has been found to exhibit two stable crystallographic modifications—face centered cubic (fcc) and double hexagonal closest packed (dhcp). The cubic latticeparameter, derived from the averaged values of 10 independent metal samples, is 4·997±0·004