STRUCTURE, MAGNETISM AND ABSORPTION-SPECTRA OF SOME ORTHOURANATES AND ORTHONEPTUNATES

被引：1

作者：

BICKEL, M ^{[1
]}

KANELLAKOPULOS, B ^{[1
]}

POWIETZKA, B ^{[1
]}

机构：

[1] KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH,INST HEISSE CHEM,W-7500 KARLSRUHE 1,GERMANY

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1992年 / 187卷 / 01期

关键词：

D O I：

10.1016/0925-8388(92)90516-C

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The crystallographic and spectroscopic properties as well as the magnetic susceptibilities of Sr3UO6, Ca3UO6, Sr3NpO6 and Ca3NpO6 were determined. Data for the uranates are in agreement with structures proposed earlier. From X-ray powder patterns and IR arguments the neptunates seem to exhibit a somewhat less distorted lattice. Electronic spectra indicate only slightly distorted NpO6 octahedra. Magnetic susceptibilities are comparable with data from other 5f0 and 5f1 systems respectively. The absence of magnetic transitions in the neptunates is explained by the unavailability of An-O-An chains in the lattice, thus suppressing superexchange via oxygen ions.

引用

页码：17 / 29

页数：13

共 33 条

[1] STRUCTURAL AND MAGNETIC-PROPERTIES OF BAUO4 AND BANPO4
APPEL, H
BICKEL, M
MELCHIOR, S
KANELLAKOPULOS, B
KELLER, C
[J]. JOURNAL OF THE LESS-COMMON METALS, 1990, 162 (02): : 323 - 334
[2] BEREZNIKOVA IA, 1961, ANL T, V33, P176
[3] MOSSBAUER AND MAGNETIC STUDIES ON ALKALINE OXO-NEPTUNATES AND ALKALINE-EARTH OXO-NEPTUNATES
BICKEL, M
KANELLAKOPULOS, B
APPEL, H
HAFFNER, H
GEGGUS, S
[J]. JOURNAL OF THE LESS-COMMON METALS, 1986, 121 : 291 - 299
[4] THE STRUCTURAL AND ELECTRONIC-PROPERTIES OF NA4UO5 AND NA4NPO5
BICKEL, M
KANELLAKOPULOS, B
POWIETZKA, B
[J]. JOURNAL OF THE LESS-COMMON METALS, 1991, 170 (01): : 161 - 169
[5] BICKEL M, 1986, KFK4109 KERNF ZENTR
[6] NEW COMPOUNDS WITH PEROVSKITE-LIKE STRUCTURES
BLASSE, G
[J]. JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1965, 27 (05): : 993 - &
[7] THERMODYNAMICS OF ACTINIDE PEROVSKITE-TYPE OXIDES .3. MOLAR ENTHALPIES OF FORMATION OF BA2MANO6 (M = MG, CA, OR SR, AN = U, NP, OR PU) AND OF BA3PU06 OR SR3PU06
GENS, R
FUGER, J
MORSS, LR
WILLIAMS, CW
[J]. JOURNAL OF CHEMICAL THERMODYNAMICS, 1985, 17 (06) : 561 - 573
[8] HENRICH E, 1971, THESIS U HEIDELBERG
[9] IPPOLITOVA EA, 1961, ANL T, V33, P186
[10] IPPOLITOVA EA, 1961, ANL T, V33, P180

← 1 2 3 4 →