SINGLE-CRYSTAL PULSED-NEUTRON DIFFRACTION FROM NIF2 AND FEF2 - THE EFFECT OF MAGNETIC ORDER ON THE FLUORINE POSITIONS

被引：18

作者：

JAUCH, W

PALMER, A

SCHULTZ, AJ

机构：

[1] ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439

[2] ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439

来源：

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE | 1993年 / 49卷

关键词：

D O I：

10.1107/S0108768193007414

中图分类号：

O6 [化学];

学科分类号：

0703 [化学];

摘要：

Extended single-crystal data sets have been collected by means of pulsed neutron diffraction from NiF2 at 295, 80 and 15 K, and from FeF2 at 295 and 15 K to examine the effect of magnetic order on the fluorine nuclear positions. A predicted internal displacement has been validated in NiF2, whereas in FeF2 it could not be established unambiguously. The positional parameters are compared with those obtained from gamma-ray diffraction data, recorded from the same samples. In view of the excellent agreement there is no evidence for any polarization effects in the antiferromagnetic phase.

引用

页码：984 / 987

页数：4

共 14 条

[1]

EXTINCTION WITHIN LIMIT OF VALIDITY OF DARWIN TRANSFER EQUATIONS .1. GENERAL FORMALISMS FOR PRIMARY AND SECONDARY EXTINCTION AND THEIR APPLICATION TO SPHERICAL CRYSTALS [J].