Neutron diffraction investigation of the dhcp and hep iron hydrides and deutendes

V. E. Antonov; K. Cornell; V. K. Fedotov; A. I. Kolesnikov; E. G. Ponyatovsky; V. I. Shiryaev; H. Wipf

doi:10.1016/S0925-8388(97)00298-3

Neutron diffraction investigation of the dhcp and hep iron hydrides and deutendes

V. E. Antonov, K. Cornell, V. K. Fedotov, A. I. Kolesnikov, E. G. Ponyatovsky, V. I. Shiryaev, H. Wipf

Research output: Contribution to journal › Article › peer-review

80 Scopus citations

Abstract

Iron hydride and deuteride with the dhcp metal lattice and iron deuteride with the hep lattice were prepared under high hydrogen or deuterium pressures and studied by neutron diffraction in a metastable state at ambient pressure and 90 K. The crystal structures of the obtained phases were refined using the Rietveld method. The composition of the dhcp phase is close to FeH_1.0 or to FeD_1.0 and its metal lattice contains many stacking faults in agreement with the previous data. Hydrogen or deuterium atoms in this phase occupy all available octahedral interstitial sites in the metal lattice. The composition of the hep phase is FeD_0.42±0.04, deuterium atoms randomly occupying approximately 0.42 octahedral site of the one available per formula unit (L′3 type structure). The hcp phase is identified with the non-magnetic phase observed earlier in the Mössbauer spectra of Fe-H and Fe-D samples at 4.2 K.

Original language	English
Pages (from-to)	214-222
Number of pages	9
Journal	Journal of Alloys and Compounds
Volume	264
Issue number	1-2
DOIs	https://doi.org/10.1016/S0925-8388(97)00298-3
State	Published - Jan 9 1998
Externally published	Yes

Funding

The assistance of Dr. A.W. Hewat and Dr. B. Ouladdiaf, ILL, in conducting the neutron diffraction experiments is greatly acknowledged. The work was supported by the Russian Foundation for Basic Research under a Grant No. 96-02-17522.

Funders	Funder number
Russian Foundation for Basic Research	96-02-17522

Keywords

Iron hydride
Neutron diffraction

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10.1016/S0925-8388(97)00298-3

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title = "Neutron diffraction investigation of the dhcp and hep iron hydrides and deutendes",

abstract = "Iron hydride and deuteride with the dhcp metal lattice and iron deuteride with the hep lattice were prepared under high hydrogen or deuterium pressures and studied by neutron diffraction in a metastable state at ambient pressure and 90 K. The crystal structures of the obtained phases were refined using the Rietveld method. The composition of the dhcp phase is close to FeH1.0 or to FeD1.0 and its metal lattice contains many stacking faults in agreement with the previous data. Hydrogen or deuterium atoms in this phase occupy all available octahedral interstitial sites in the metal lattice. The composition of the hep phase is FeD0.42±0.04, deuterium atoms randomly occupying approximately 0.42 octahedral site of the one available per formula unit (L′3 type structure). The hcp phase is identified with the non-magnetic phase observed earlier in the M{\"o}ssbauer spectra of Fe-H and Fe-D samples at 4.2 K.",

keywords = "Iron hydride, Neutron diffraction",

author = "Antonov, {V. E.} and K. Cornell and Fedotov, {V. K.} and Kolesnikov, {A. I.} and Ponyatovsky, {E. G.} and Shiryaev, {V. I.} and H. Wipf",

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T1 - Neutron diffraction investigation of the dhcp and hep iron hydrides and deutendes

AU - Antonov, V. E.

AU - Cornell, K.

AU - Fedotov, V. K.

AU - Kolesnikov, A. I.

AU - Ponyatovsky, E. G.

AU - Shiryaev, V. I.

AU - Wipf, H.

PY - 1998/1/9

Y1 - 1998/1/9

N2 - Iron hydride and deuteride with the dhcp metal lattice and iron deuteride with the hep lattice were prepared under high hydrogen or deuterium pressures and studied by neutron diffraction in a metastable state at ambient pressure and 90 K. The crystal structures of the obtained phases were refined using the Rietveld method. The composition of the dhcp phase is close to FeH1.0 or to FeD1.0 and its metal lattice contains many stacking faults in agreement with the previous data. Hydrogen or deuterium atoms in this phase occupy all available octahedral interstitial sites in the metal lattice. The composition of the hep phase is FeD0.42±0.04, deuterium atoms randomly occupying approximately 0.42 octahedral site of the one available per formula unit (L′3 type structure). The hcp phase is identified with the non-magnetic phase observed earlier in the Mössbauer spectra of Fe-H and Fe-D samples at 4.2 K.

AB - Iron hydride and deuteride with the dhcp metal lattice and iron deuteride with the hep lattice were prepared under high hydrogen or deuterium pressures and studied by neutron diffraction in a metastable state at ambient pressure and 90 K. The crystal structures of the obtained phases were refined using the Rietveld method. The composition of the dhcp phase is close to FeH1.0 or to FeD1.0 and its metal lattice contains many stacking faults in agreement with the previous data. Hydrogen or deuterium atoms in this phase occupy all available octahedral interstitial sites in the metal lattice. The composition of the hep phase is FeD0.42±0.04, deuterium atoms randomly occupying approximately 0.42 octahedral site of the one available per formula unit (L′3 type structure). The hcp phase is identified with the non-magnetic phase observed earlier in the Mössbauer spectra of Fe-H and Fe-D samples at 4.2 K.

KW - Iron hydride

KW - Neutron diffraction

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DO - 10.1016/S0925-8388(97)00298-3

M3 - Article

AN - SCOPUS:0032498064

SN - 0925-8388

VL - 264

SP - 214

EP - 222

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

Neutron diffraction investigation of the dhcp and hep iron hydrides and deutendes

Abstract

Funding

Keywords

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